Kokabiel had launched an attack on Kuoh Academy and the ORC had head to the school to desperately stop the war fanatic. A blueish-purple translucent barrier appears over the school

Sona: We've created a protective barrier around the academy. If all goes well, it should contain the damage.

Rias: Thank you. This will really help, Sona.

Sona: However, I can't guarantee it will hold if the situation changes.

Rias: True.

A light blue magic circle appears behind the group and out comes the Queen of Sona's peerage.

Issei: Vice president! How's Irina doing?

Tsubaki: Her life is not in danger thanks to you, Argento-san.

Asia: What a relief!

Issei: What happened to Xenovia?

Saji: No sign of Kiba or Y/N, either?

Issei: Yeah. I've tried calling them. But I just know they're okay.

Koneko: (nods) I'm sure.

Sona: We'll do our best to keep the barrier up, but the school buildings may not remain intact. A most regrettable loss.

Rias: We won't let that happen.

Sona: (looks back) Rias, we still have time. Call your brother.

Rias: (shakes head) In that case, shouldn't you also call your sister?

Sona: My family does not...I'm sure your brother loves you dearly. (thoughts) Calling her would only make it worse. Especially if Y/N is involved. (normal) Sirzechs will surely act. So please...

Akeno: (walking up to pair) I've already contacted Sirzechs-sama.

Rias: Akeno!? I didn't ask you to do that!

Akeno: (stern) Rias, although I fully understand that you do not wish to cause trouble for your brother, our enemy is one of the leasers of the Fallen Angel. This enemy is our of our league. (smiles) Let's take the Satan's helping hand.

Rias: (sighs in approval)

Akeno: I appreciate your approval, buchou. Sirzechs-sama's reinforcements should arrive in about an hour.

Rias: Good grief. Always one step ahead of me, aren't you? One hour, you say?

Rias and her peerage then enter the school, making their way to the back where Kokabiel awaits them.

Rias: Issei, I need you to act as our support.

Issei: Support?

Rias: I want you to share your heightened power, the power of your gift, with everyone.

Issei: I see. I can do that!

Rias: (looks to Akeno and Koneko) Until Issei can share his power, I'll need you to buy us some time.

Akeno: Yes ma'am.

Koneko: Yes, buchou.

Rias: Issei.

Issei: Y-Yes?

Rias: I'm counting on you.

Issei: Of course!

Rias: We're on the offensive this time. We're going to storm the academy to prevent Kokabiel from releasing his power. Unlike our battle with Riser, our lives will be on the line. However, I won't allow any of you to die. My precious servants, come back alive so we can study here once again!

Everyone: Right!

Issei: Promotion...Queen!

They all head outside to see energy of light heading up to the sky. It seemed to be connected at a single interval point. The ORC head there only to find that Valper was trying to fuse all four Excalibur swords.

Kokabiel: Is Sirzechs coming? Or is it Serafall?

Rias: In place of my brother and Leviathan-sama, we have come!

Kokabiel sat upon his throne in the sky and conjured a light spear. The ORC thought this attack was aimed to their King, but was wrong as Kokabiel threw it to where their school gym was. The spear lands into the gym and seconds later, it explodes, destroying the gym.

Issei: The gym!

Kokabiel: How boring. Oh, well. We'll have some laughs.

Issei: N-No way...

Ddraig: Scared, partner?

Issei: (moves hand to face) That's the biggest spear of light I've ever seen! He's way out of our league!

Ddraig: Yeah, you bet he is. He fought God and the Satans and survived, after all.

Issei: Do we even have a chance?

Ddraig: If worse comes to worse, I'll turn most of you into a dragon to beat him.

Issei: Most of me, huh? He's that strong, huh!?

Kokabiel: (grins sadistically) Since you've come all the way out here, why don't you play with my pets!?

A beam of light emerges under Kokabiel's throne and emerges a three-headed dog. The Cerberus.

Rias: Cerberus!?

Akeno: The dog that guards the gates of hell.

Asia: (terrified) The gates...of hell.

Rias: He summoned it in the human world!? Let's go Akeno, Koneko!

Koneko/Akeno: Yes, buchou!

Rias: (flies into air) Issei, use your sacred hear to give us power!

Issei nods and drops the broken Blue Rose Sword, the broken blade falling into the ground. Issei then equips his gauntlet, a bright green light envelops his arm as he summons it.

The battle rages on as the ORC engage the Cerberus. Akeno freezes it's fiery breath attacks as Rias attacks from the air using her magic of destruction. Koneko using her brute strength as a Rook attacks using her leg power, striking the Cerberus's head. Akeno attacks once more, using her powers that gave her namesake.

The two Cerberus did not sustain any damage as Asia hides behind Issei, who is still charging up his sacred gear. Asia shrieks behind him as Cerberus was about to attack. Issei then tackles Asia, pushing her out of the way from the fiery attack that was aimed for her. While being attacked, the power that he had gained was reset back to zero. Issei runs towards the Cerberus, allowing Asia to get away. Koneko then comes in, kicking the face of the Cerberus, buying Issei time to charge up his sacred gear so he could grant power to his allies.

As Koneko takes care of the Cerberus, Asia heals the damage that was inflicted upon Koneko. Issei then acts as bait so he could allow Asia to heal Koneko. Just as the Cerberus lunges at him, a slashing noise was heard. Xenovia slashes her way into battle.

Xenovia: (grins) I'm here to help.

Issei: Xenovia!

Xenovia quickly slashes the Cerberus to pieces, killing the demonic dog. Then red magic sprites were spotted flying through the air. They hit the ground and explode. Everyone turns to the disturbance and only find Y/N walking towards them.

Issei was overjoyed, but paused as soon as he glanced at Y/N. He was walking towards them, but the only difference was his eyes. His eye color wasn't their normal black, but a golden yellow. Issei wondered, "what is this power he is giving off?"

Y/N: Sorry I'm late guys.

Issei: (smiles) Y/N, you bastard! I knew you'd show up!

Then Issei's sacred gear glows. signaling his power has built up and is ready to be transferred. Issei then runs in the direction of Akeno and Rias, ready to give his power. He leaps into the air and touches the two female Devils in the air, transferring his power.

With their boosted power, Akeno and Rias unleash their magic. Meanwhile, Asia was to be attacked by one of the Cerberus until multiple swords burst out of the ground. Kiba had returned and made his appearance. All three swordsman had arrived on the battlefield. Rias and Akeno then coordinate their attacks, combining them and defeating the last Cerberus.

Kokabiel: That was quite an interesting show.

Rias then shoots the last of her enhanced magic towards Kokabiel, hoping to damage him. What shocked them most was when Kokabiel simply reflected it, shooting towards the direction of the tennis court. The enhanced magic shot crashes into the ground, creating a massive crater that was in the tennis court.

Kokabiel: (stands up from throne) I see. The Red Dragon Emperor's power can make you this much powerful. Intriguing...so very intriguing!

Valper: It's complete!

Everyone then moves their attention to Valper and bright yellow light. All four Excalibur swords had been combined into a more powerful weapon.

Valper: Now, at long last!

Y/N stares at the weapon with hatred, as does Kiba. It wasn't until Y/N felt a familiar powerful presence. 

Y/N: (thoughts) Vali...he's reacting to the magical power here...

Kokabiel: Upon the fusion of the Holy Swords, I will use the energy that is released. That was our deal.

Rias: You put that much power into an earth-breaker spell!?

Issei: No...are you telling me that this...our hometown...is going to be disappear!?

Valper: (chuckle) You better get out. This city will be razed to the ground within twenty minutes.

Kokabiel: If you want to stop it...you'll have to defeat me. What now (releases wings) ...Rias Gremory!?

Rias: Need I answer! (fires magic shot)

Kokabiel smirks as he catches the magic shot in his hand. Akeno then soars above Kokabiel, firing her thunder towards the leader class Fallen Angel. This was futile as well as Kokabiel catches that magic in his other hand. He combines the two, creating his own large magic ball, firing at Rias. Akeno quickly maneuvers herself in front, putting up a barrier, but is destroyed easily due to how powerful the attack was.

Akeno then falls to the ground but is caught by a worried Issei.

Akeno: (surprised) Issei-kun!?

Issei: Are you alright, Akeno-san?

Akeno: (blushes) I'm so sorry. You gave me you're power, yet...

Issei: That doesn't matter. (stands up) How dare you hurt Akeno-san!? I won't let you get away with this!

Akeno: (blushes harder) He really is quite a man.

Asia then rushes to Akeno's side, healing her and Rias flies down to her best friend's side as well.

Akeno: We won't be able to last until Sirzechs-sama's arrival.

Rias: We have to do something. (gasps) Yuuto? Y/N?

Currently, both Y/N and Kiba were making their way towards Valper and the now combined Excalibur.

Issei: Kiba...Y/N...

Y/N: Valper Galilei...

Kiba: We are survivors of the Holy Sword Project. In truth, you killed us. I was able to live by only being a Devil.

Y/N: While I was able to live by walking the path I'm walking now.

Y/N and Kiba: (grins) We cannot die...before we avenge our deceased comrades!

Rias: Look out Yuuto, Y/N!

Issei: This is bad!

Koneko and Issei both run to Y/N and Kiba's side as Kokabiel was about to attack the boys. But, Kokabiel's light spear had already left his hand and it struck the area between the two ORC members and the survivors. They get up to see if they're okay, but they found them on the ground.

Kokabiel: They dodged the direct hit. Nimble rats. Freed.

Freed: (grins sadistically) Yes boss!?

Issei: You again!

Kokabiel: This is the last act. Use the power of the Holy Swords, and destroy these Devils!

Freed: Gotcha! O gloriously upgraded Excalibabe-chan, (grasps Excalibur) you surely doth rest well in my hands.~ Now then, who's going first? Well, which shitty Devil wants to taste the powers of my new sword?

Just before Freed swung his sword down, Xenovia had jumped in, swinging her own Excalibur sword. But it was slow so Freed was able to dodge it easily. Freed then appears behind the blue haired girl and swings his sword up, but Xenovia handstands and kicks Freed's face in, sending the stray priest to shriek.

Freed: (clutches face) You shitty bitch! How dare you kick my beautiful face! I will hack you into pieces, lots of little pieces!

Freed uses the power of the Excalibur blade, extending it's reach. Xenovia jumps into the air, but more blades come into attack due to the power of Excalibur Mimic. She parries the blades that came her way. Freed then produces multiple copies of himself, using the powers of Excalibur Nightmare.

Xenovia was confused as she doesn't know who was the real one that was coming after her. Then Freed cloaks the blade as he swings it. She parries all the strikes that came from the clones.

Xenovia: So you have merged all the swords powers into one.

Freed: Right you are, now get ready!

She was cornered, but she still chose to fight.

With Kiba and Y/N

Kiba was seen recovering from the blast as he gets up, weakened. Y/N on the other hand was till lying on the ground. His coat had been blown off. The only thing he had on was a ripped up shirt, pants, and a breastplate.

Valper: I did know there was one running loose, but two? Most intriguing. (laughs) But who would have thought one of them became a Devil!? I am grateful to both of you're contributions. Thanks to you, the experiments finally succeeded.

Kiba: Succeeded!?

Valper: The power each of you subjects had was not enough to wield a Holy Sword, well except for the black haired one. He could have, but he suppressed his own power. But you brought me a solution. I simply had to take the power out of them! Then I found a way to crystallize it. (brings out crystal) This crystal was made from the subjects' power! The last one that is!

Freed: (laughs maniacally) Everyone died because their bodies couldn't handle da powah! Makes ya think, I gotta be made of super awesome sauce, huh!?

Issei: Damn you!

Xenovia: (sees crystal) That's...at the time we were blessed with the power to wield the Holy Swords, she put one of those into her body. It was to give us the power we lacked?

Valper: Those hypocrites. They shunned me as a heretic, yet they kept using the results of my research! If it were Michael, he probably took power from people without killing them!

Kiba: There wasn't any need to kill us, then. So why!?

Valper: You were simply materials for those experiments. What was I supposed to do with you if I didn't dispose of you?

Kiba: We believed that we were serving the Lord...and bore excruciating pain. Y/N the most had bore the most pain out of us all...taking the most life-threatening ones...and yet he still kept on going with a smile! Materials? Dispose?

The others just watched in sadness. Kiba and Y/N were used as merely tools and nothing more. They were never loved. They were thought to be expendable items.

Valper: (tosses crystal) Take it if you want. We have technology to mass-produce even more refined crystals.

Kiba then picks up the crystal and starts to remember the screams his pained comrades were giving out. The hellish days and nights they spent at the warehouse.

Kiba: My friends...

Issei: You bastard. You're going to hell for this!

Kiba: Valper Galilei...how many lives did you out to waste for your experiments and your greed?

Then the crystal starts to react to Kiba's soul. The deceased children's come out and they start to heal Kiba's soul. But what of Y/N?

Y/N's Mind

(A/N): Taking a page out of SAO Alicization: War Of Underworld here. But, I modified the speech myself.

Y/N was standing in a void of nothingness. Then the flashbacks of the nightmares, the experiments, the killings...they were coming back to them. The pain they were giving him. It hurt so much that he started to rip the jacket and his shirt her was wearing, digging into his chest and taking out his heart. Just as he was about to stop it...a hand stopped him.

He looked up with tears in his eyes and he sees...

Y/N: I-Irina...

Irina: What are you doing?

Y/N: I-It hurts to keep on living...the guilt...it hurts. I want it to stop!

Irina: And leave everyone alone?

Y/N: I was always alone...no matter what. Wherever I went...I was always alone...

Irina: No you weren't...

Y/N: Huh?

Irina: You were never alone. You had all these amazing friends...these people that you met. They care for you. Don't throw away you're life away here.

Then different memories appear. Y/N's first day with Serafall and the Sitri family. Him meeting the other Devil kings. His duel with Sir Eugeo and him receiving the Blue Rose Sword. His joint contract with Klein and his little band of samurai's. The memories he spent with his friends in the Holy Sword Project. Then came to his memories as a child. He watched as they all came back to him. 

Y/N looks to the side to see Kiba, offering his hand. Y/N smiles and grasps his hand. Kiba pulls him up and Y/N looks back to Irina, who only smiles and waves. Y/N made his choice. His soul was healed.

Back at the Kuoh Academy

Kiba then absorbs the crystal and reaches his peak. He reached his Balance Breaker. His comrades never wanted vengeance. Kiba then raises the sword he produced.

Kiba: I will become a sword. My comrades, now one with my soul, let us fulfill our regrets and our dreams of those days. I will become the sword of buchou and my allies! Sword Birth!

Dark energy and light energy began to circle and rise within the blade. They now come together, his Balance Breaker, a sword filled with Demonic energy and Holy energy.

Kiba: Behold, the Sword of Betrayal...a blade that is both Holy and Demonic!

Rias: A Holy and Demonic sword!?

Issei: That's it! The dragon within me said...that Kiba had reached his peak. That's Kiba's forbidden technique. His Balance Breaker!

Valper: A Holy Demonic Sword!? That's impossible! Two opposing forces coming together? That could never happen!

Valper was about to speak until the air shifts the temperature. It was now cold.

Kiba: (thoughts) The smell of...roses?

Everyone looks to the cause, leading them to the broken Blue Rose Sword in Y/N's hand. There was a faint blue ethereal figure kneeling next to Y/N. Y/N then took a deep breath.

Y/N and Eugeo: Enhance Armament.

A blue magic circle appears under Y/N, freezing the foe's of the ORC. The Black Swordsman had awakened. However, Freed had broke out of his ice prison and charged at a distracted Kiba and Xenovia. Xenovia then pulls out the Holy Sword, Durandal, and the two swordsman were about to brace for an attack until a yellow barrier appeared in front of them.

The two then looks back to Y/N who was getting up and slowly made his way towards the both of them. As soon as he got near the barrier, he repelled the barrier, sending Freed flying. Y/N turns back and gives his comrades a reassuring smile. Y/N then unsheathes Elucidator, raising it high in the air and it changed. It was still black, but it had shades of purple and blue. This was Y/N's true blade. The Night Sky Sword.

Y/N raises his sword and Freed charges. Y/N parries the attacks as Freed was keeping him on the offensive, giving him no chance for him to attack himself.

Y/N then blocks the last strike as the combined Excalibur inches near his neck. Y/N could force the blade off, but that would mean letting go of the broken Blue Rose Sword. Kiba and Xenovia were about to charge in and help Y/N, but they could see blue ethereal figures behind Y/N. It looked as they were supporting him.

Y/N turns his head around slightly and sees his fallen comrades he lost in the warehouse. He even saw Eugeo. They nod at him and Y/N produces a tearful cry. With the help of his friends, he forced Freed back and he raised the broken Blue Rose Sword into the air.

Y/N and Eugeo: Release Recollection!

The broken Blue Rose Sword was now sucking the life of Valper, who was still stuck in the ice, and the blade was growing a stack of ice. It shatters to reveal a new blade had been formed. Y/N then raises the other sword in the air, gathering the energy from his allies, far and wide. It heals the scars that he had endured and it slowly began to re materialize his coat, back to his original appearance.

Freed: So what you got you're coat and swords back! (grins sadistically) You can't beat this! (raises Excalibur)

Y/N: (gets into stance) Then prove it.

(A/N): This fight scene is like the fight between Kirito and PoH or Vassago in SAO: War of Underworld. 

They both charge at each other as Freed raises Excalibur with two hands and swings it down repeatedly as Y/N parries the strikes before deflecting the last one and runs in the other direction. Freed thinks that he got the Black Swordsman to run and flee so he lowers a bit of his guard and chases after him. Freed then runs on a nearby wall, jumps off of it and slashes down. Y/N dodges and jumps onto the same wall that Freed was on, kicking off of it, thrusting the Night Sky Sword forward. Freed deflects the blade upwards, sending Y/N up into the sky with it. Y/N then turns around and extends his arm out in the direction of Freed.

Y/N: Burst Element!

Sprites of red leave Y/N's hand as it hits the ground, exploding and creating a smokescreen. Freed looks around confused, until he hears a cry. He turns around to be nearly met with Y/N's Blue Rose Sword and Night Sky Sword against his throat. Before it could cut his head off, Freed kicks Y/N in the stomach, sending him out of the smokescreen. Y/N activates {Deadly Sins} on the left sword. Freed swings Excalibur around to clear the dust. He then utilizes the power of Excalibur Nightmare and creates two other decoys of himself.

The first decoy swings the upwards, with Y/N parrying it and swing his diagonally, eliminating the first decoy. The second one comes overhead and swings Excalibur down. Y/N dodges by doing a 360 spin and swings his sword horizontally, killing the second decoy. The real Freed comes in in front and swings Excalibur down and Y/N parries and moves to the side before doing an overhead swing, but Freed parries that strike. Freed then tries to strike from below. Y/N then utilizes Skill Connect, following up with the skill {Vorpal Strike} again. The two blades collide, sending a massive shock wave and the ground begins to crack underneath the two. Freed then notices Y/N's eyes begins to turn to a golden yellow color and begins to push forward, the Excalibur sword beginning to crack itself. The blade shatters and Freed moves to the side, but Y/N's Night Sky Sword was able to cut off his arm. Then a pillar of light envelops where the strike occurred, causing a gust of wind to pick up and the ground begins to shake.

The dust subsides and Y/N looks to his left to see Freed was cowering on the ground, clutching were his arm was.

(A/N): Obviously this didn't happen in the anime or manga/light novel, but since Y/N is there, this happened.

Freed: You son of a bitch! You shattered it! These little shits are beating me!

Y/N: Boku wa...makenai.

Y/N then turns to Valper who falls on his hind, knowing his death is near as Kiba was walking towards him. It wasn't until he kneels.

Valper: How can this be. Wait, everything makes sense if the balance between the Holy and the Demonic is skewed! Therefore, both the Satans and God--

He was interrupted as Kokabiel had fired a light spear at him, piercing his back and killing him.

Kokabiel: Valper, you were very capable. The fact that you reached that conclusion proves it.

Rias: Kokabiel, what's going on?

Kokabiel: I don't need those men to complete my plan. Now, I'm done watching. (looks to Issei) Boy.

Issei: (scoffs) What!?

Kokabiel: Maximize the Red Dragon Emperor's power and give it to someone.

Issei: What!?

Rias: You're going to give us a chance? You must be joking!

Kokabiel: (laughs) You're the one joking. You think you can defeat me?

Rias then grasps Issei's hand, making the perverted boy to look at her. What was her plan?

Rias: We don't have any time. I'll do it.

Y/N: I'll help too.

Rias: How?

Y/N smirks as black, transparent wings appear behind him.

Y/N: Will this help? I can support you in the air.

Issei and Rias nod at Y/N and the two then start to walk forward, Issei's Boosted Gear boosting. Y/N then slowly rises into the air, watching the two as the walk forward. Issei's sacred gear boosts one more time and a symbol appears on the green orb.

Issei: Buchou, I'm ready.

Rias: (grips Issei's hand) Issei.

Issei: Boosted Gear, Gift!

The gauntlet glows green and transfers the power to Rias. Rias moans in pleasure as she feels the power flowing through her. She releases her magic and the power begins to shake the ground, causing some small rocks to rise off the ground.

Asia: Incredible...

Kiba: I can feel her magic pulse all the way out here.

Y/N: (thoughts) This power...it's as powerful as Sirzechs. Most impressive.

Kokabiel: (laughs) That's some good magical power! That's the power of an Ultimate Class Devil, Rias Gremory. I see that you're now as gifted as your brother.

Rias crosses her arms, opening her hands and created red magic circles. Dark red orbs of destruction were produced.

Rias: Begone!

She unleashes it towards Kokabiel and Y/N raises his hand, sprites of red make their way towards Kokabiel as well.

Kokabiel: Excellent, sister of a Satan, sister of Sirzechs!

While Kokabiel was certainly feeling the damage, it wasn't enough so Rias produces a larger magic circle and fires a larger orb of destruction. But it wasn't enough as Rias falls to the ground, exhausted.

Issei: Buchou!

Rias: (looks up) Akeno!

Akeno: Lightning!

Lightning comes to Akeno's finger tips and she fires a blast of electricity in the direction of Kokabiel. Kokabiel tanks the shot.

Kokabiel: You dare try to stop me, wielder of Baraqiel's power?

Akeno: Do not...associate me with that name! (intensifies power)

Issei: Baraqiel?

Xenovia: He's a leader of the Fallen Angels. He controls lightning, hence his alias, "Lightning."

Issei: Lightning...

The power of lightning then starts to cease as Akeno was starting to grow tired.

Kokabiel: (laughs) You actually defected to the Devils. You've got an interesting family, Rias Gremory. The Red Dragon Emperor, a remnant of the Holy Sword Project, and Baraqiel's daughter!

Issei/Xenovia: What!?

Issei: Akeno-san, is the daughter of a Fallen Angel?

Kokabiel: (chuckles) Rias Gremory...I see that you like to collect junk, just like your brother.

Rias: (stands up) I won't allow anyone to ridicule my brother, our Satan. And above all, such words toward my servants must be punished by death!

Kokabiel: Then kill me, sister of a Satan, master of the Welsh Dragon, crimson-haired princess of Ruin! You're facing your sworn enemy! Only a coward would let this chance slip by!

Issei: Hey, you damn Fallen Angel!

Rias: Issei!

Issei: Keep on insulting buchou and Akeno-san, and I'll beat the hell out you!

Kokabiel: Are you out of your mind?

Issei: I guess I am! Stay right there! Boosted Gear!

Rias: Stop, Issei!

Xenovia and Kiba nod to each other as they charge at Kokabiel.

Xenovia: Hyoudou Issei, we shall buy you some time!

Kiba: Build up your power!

Y/N: Aerial Element!

Y/N releases a gust of wind, but Kokabiel simply swings his light sword that he produced, cutting the simple magic.

The two swordsman clash with Kokabiel, who parries their blades with light swords. As he's distracted, Koneko comes from above, aiming to strike. But using his wings, Kokabiel attacks, sending the three flying in pain. 

Kokabiel: I'm surprised that you're still fighting after losing your leader.

Xenovia: What?

Rias: What are you talking about?

Xenovia: Kokabiel, why did you say I've lost my leader!?

Kokabiel: Oh, I wasn't supposed to tell.

Xenovia: Answer me, Kokabiel!

Kokabiel: (laughs hysterically) Of course, I almost forgot! I'm stirring up a war, so there's no need to hide anything! In the Great War, when the four Great Satans died, so did God!

The revelation that God had perished in the Great War shocked everyone, except Y/N.

Xenovia: (wide eyed) I-It can't be.

Rias: God is...dead? You're crazy! Such a thing would never happen!

Kokabiel: The war brought an end to all Satans and many High Class Devils, as well as most lower Angels and Fallen Angels. Pure Angels could no longer reproduce, and there are very few pure-blooded Devils.

Asia: There's...there's no way!

Kokabiel: All three factions needed to rely on humans to survive. The leaders of the three major factions, Angels, Fallen Angels, and Devils...concealed God's death to make the humans, who believe in God, survive!

Xenovia: (falls to ground in disbelief) Liar. Liar!

Kokabiel: This doesn't matter to me though. What I truly cannot bear is that after the deaths of God and the Satans, we decided that war was no longer meaningful! I can't bear it. I can't bear it! They told us to lower our raised fists! We would've won if we'd keep fighting! That asshole Azazel even proclaimed there'd never be another war. Inconceivable!

Asia: If the Lord is gone...then where is His love coming from!?

Kokabiel: Michael's doing a good job. He's taken God's role in leading both the Angels and humans.

Xenovia: Archangel Michael is substituting God? Then...we were...

Kokabiel: As long as the system is working, prayers, blessings, and exorcisms should work, at least to some extent. ...There has, however, been a decrease in the number of people who believe in God. With the absence of an entity to maintain the balance between the Holy and Demonic, anomalies such as that Holy Demonic Sword are bound to happen. The two elements should never come together. I'll end this war how it was supposed to end...and take your heads as trophies!

Akeno: Rias...

Rias: Again. Again, I refuse to let go of my dignity, and I...

Issei: Shut up!

Rias: Issei?

Issei: Your little complaints are no reason to destroy our homes and our friends! And...and...and I'm going to become...the Harem King!

Xenovia: What!?

Issei: I won't let you stop me from achieving my dream!

Kokabiel: (laughs) Harem King? That's the Red Dragon Emperor's goal? Then follow me. You'll become the Harem King in no time. Wherever you go, I'll provide you with the most beautiful women. They'll be yours to sleep with.

Issei: Th-Those words of yours...(starts to smile) shouldn't fool me--

Rias: Issei!

Issei: I-I'm sorry! It's hard for me to turn down a harem!

Rias: Since you love girls so much, if we get out of here alive, I'll do all kinds of things for you.

Those words ring in Issei's ears. Just as he was about to do something, he stopped. Kokabiel then flies up into the air, but they all forgot one person. They felt strong magical power rising. They all look to Y/N who readies his swords, with golden eyes illuminating.

Y/N's swords then starts to glow blue and flies forward with a battle cry.

Y/N: ...Starburst Stream!

Y/N then engages {Starburst Stream}, slashing his way through, dealing massive damage as Kokabiel couldn't do anything to stop his assault.

With one last strike, Y/N raises the Blue Rose Sword into the air.

Y/N: Take this, Kokabiel!

He brings the sword down, only to have his arm cut off. He thought he failed...everyone did. Until a bright blue light shined. Y/N opens his eyes and they widen. Eugeo was holding on to the blade, striking it against Kokabiel. He looks back and gives his last message.

Eugeo: This is the end of the road. Finish it!

Y/N then raises the Night Sky Sword, bringing it down for a seventeenth hit. He strikes it in and Kokabiel screams in pain as he explodes and bright light of different colors fill the sky.

It starts to clear as everyone looks into the sky and watches as Y/N comes down, his severed arm restoring itself. Y/N opens his eyes and the golden eye color fades.

Y/N: Did...I do it...?

He lands safely on the ground and he's caught by Kiba who props him up correctly.

Kiba: You really have a way making us worry, you know that?

Y/N: (chuckle) Yeah...I do...

Y/N starts to close his eyes until they snap open to see a weakened Kokabiel on the ground.

Kokabiel: You little rat...you thought you could defeat me!

Kokabiel raises his hands and aims a light spear at the two. He was interrupted as Kokabiel was being pummeled by Issei. Y/N and Kiba were dumbfounded and sweat dropped as Issei gained this much power just by thinking of having his way with Rias.

Issei: Listen here, Kokabiel. I am Issei Hyoudou, a man of libido and strong will, host of the Boosted Gear, and a Pawn of Rias Gremory!

Kiba: You may think you sound cool, but...

Koneko: (deadpan) You just listed a lot of your problems, Issei-senpai.

Y/N: I don't even know why he's like this...

Kokabiel: How dare a Low Level Class Devil like you hit my face! How exciting. This is exciting, kid!

Vali: Is that so?

Kokabiel: Huh? (looks up) Who is that!?

Y/N knew that voice all too well. They all look up to see the barrier cracking and a white armored figure flies down.

Issei: I can't stop shivering! Who the hell is that!?

Kokabiel: The Vanishing Dragon!

Issei: The Vanishing Dragon!? Th-Then is he...

Kokabiel: Has the Red One drawn you here, White Dragon!? Get out of my---

He was interrupted as Vali struck his back.

Issei: What just happened!?

Kiba: Even I couldn't tell!

Y/N: Hmph...just as powerful as always...

Vali: They look like a crow's filthy wings. Azazel's wings are much darker, like an eternal void.

Kokabiel: You...what are you after!?

Vali: There's no need for a man who has fallen below to the ground to have wings.

Kokabiel produces a large light spear until Vali uses the Vanishing Dragon's power, Divine Dividing. The light spear disappears much to Kokabiel's shock.

Vali: I am Albion. My sacred gear is "Divine Dividing." Every ten seconds, it halves the power of whoever I touch...and gives it to me.

Issei: Halves the power!?

Y/N: You're polar opposites, Issei. The Welsh Dragon doubles it's hosts power and gives it to someone while the Vanishing Dragon halves power and takes it as it's own.

Rias: So the legends are true.

Vali: How boring. I thought you'd put up a better fight.

Vali then lunges forward and punches Kokabiel in his stomach.

Vali: You stepped too far out of your league. Azazel asked me to bring you back at all costs.

Vali then flies high into the air and plunges Kokabiel into the ground, creating a magic circle and transporting Kokabiel to Azazel.

Y/N: Impressive as always...Albion...

Kiba: You've met?

Y/N: On a few contracts. (thoughts) We have sparred a few times.

Vali: I have some questions for that stray exorcist as well. I'll finish this after I get answers.

Vali picks up Freed and was about to leave until a familiar voice stops him.

Ddraig: Ignoring me, White One?

Rias: The gauntlet spoke?

Albion: So you were alive, Red One.

Ddraig: This wasn't exactly the best time to meet.

Albion: It's alright. We're destined to face each other someday. Coincidences do happen.

Rias: The Red Dragon Emperor and the White Dragon Emperor meet.

Albion: I'll see you later, Ddraig.

Ddraig: See you, Albion.

Issei: Hey! What's going on!? Who the hell are you!? Thanks to you, I...I can't...I can't suck buchou's boobs!

Vali: You need to power to understand the whole truth. Become stronger, my sworn enemy, destined to face me someday. (looks to Y/N) Until next time, Y/N.

Y/N nods and Vali flies away.

Sona: Rias.

Rias: Sona!

Sona: I never thought the White Dragon Emperor would come.

Rias: He saved the city, though.

Sona: I guess so. Now, Tsubaki, let's repair the school.

Y/N: Before you do that, can you take me to Irina.

Tsubaki's heart felt like it shattered when she heard that name. She liked Y/N. Sona stares into the eyes of her adoptive nephew and can see the desperation in his eyes. She smiles and nods, producing a magic circle under Y/N and transports him away.

Y/N opens his eyes as he's in a secluded area. Sona only used this place for the heavily injured as Y/N had been here before from after one of his contracts. He makes his way to the infirmary. He opens the door and smiles as he looks at her.

She gazed out the window into the night sky. Her violet eyes then move towards the door and she locks eyes with the black haired boy. She smiles warmly as Y/N moves towards her as she sat upon the bed. He climbs on the bed and puts a hand on her shoulder, bringing her into a hug.

Y/N: I missed you...Irina...

Irina: ...I missed you too, you big dummy.

They separate and they both wipe their tears. They lean in and close their eyes, their mouths inches apart. Their lips then close the gap and they engage in a sweet but passionate kiss. Two childhood friends...something between them sparked.

(A/N): Just pretend Asuna is Irina. And ignore the scar.

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One of the longest chapters I have written. Probably the longest. About more than 6000 words in this one. I hope you all enjoyed this one as this took about three days to make. My hands hurt...a lot. Stay tuned for the next one! Stay safe out there.

-okami