"So, this will be our new base of operations!" Issei proudly announced to the members of his undead Legion. Their numbers were less than 100 and only 25 of them were intelligent enough and even less of them preferred their flesh and blood form. 

"Our connections with other organizations are going strong," Johnny said with a smile as they sat in Dogeza at the designated 'meeting room'. 

"Good to know, Tut?" 

"Our intelligence division has tapped into the numerous organizations inside Kuoh town and we are currently working with Lady Kiana's exorcist division," 

"Very well. Liest?" 

"Our studies on the numerous species have provided a lot and we have compiled the reports into a journal, my lord." 

"Excellent." 

Out of the 25 intelligent undead he had, they were all separated into different divisions. 

Liest is the head of the Research and Development division. 

Johnny is in the Medical department

Tut is in the intelligence  division

Timothy is in the Management Department

Finally, the last division, the strike squad, is led by Luna, an ancient vampire of Doomwood.  

"What about me?" Seele asked, flanked by her Grim Reaper bodyguards. Unlike the rest of them, her Grim reapers were only under her command. While the authority she has over the Undead Legion is higher than Timothy's status as his second-in-command, they still listen to his orders. 

"Well, you are our ambassador," Issei said with a shrug. 

"Good to know," Seele said with a smile, rubbing Zvezda's back. The undead Dragon currently the same size as a cat said nothing as it rested on Seele's lap. 

"How is our alliance with the Church, Tut?" 

"Our alliance is going well, word is that the biblical factions will have a peace treaty in a few weeks," 

"That's interesting," 

"Speaking of alliance, apparently Subject FA-001 is working under the orders of Azazel," 

"The scapegoat?" One of the Grim reapers said, looking at the Mummy. "That's... out of character," 

"She did say I have a sacred gear in me," 

"But you never woke it up," Seele said. 

Hearing this, the Grim Reapers went silent. They all knew the strength of the human in front of them first hand after he managed to damage their lord Hades a bit and to think that was without a sacred gear. 

"What do you think is it?" Issei asked, turning to the Princess of the Underworld. 

"I'm not sure, we won't know unless you awaken it," 

"Well, it's a gauntlet of sorts," Aegis, the Elemental Spirit of Valor said as he floated by Issei's side. "I don't know much but it's intertwined with your soul and your training as a Soulweaver might have locked it a bit," 

"How?" 

"Magic," 

"Fair point." 

"Can we take it out?" Issei asked before noticing the frown on Seele's face. 

"Issei, ripping a Sacred Gear out of someone will kill them," 

"But... didn't I already die?" 

"Yes and no. Your lichdom is far different than the standard," Seele whispered. "While a lich would normally be animated by a single element, my blessing and your use of multiple elements allowed you to retain your life and human form." 

"My theory is that since Soulweavers after bonding with A Soul Ally, their souls become more threadlike, allowing them to become Elemental Spirits after death at the cost of going to their preferred afterlife. With you becoming one, the Sacred Gear has merged with your soul and will only disappear after you suffer an Elemental Spirit's true death," Aegis explained, looking at Issei. 

"That's two layers of immortality," 

"Three, actually," Issei revealed. "I'm not only a lich, I also have eternal youth thanks to Draco," he said with a smile and the adorable baby dragon perched on a fluffy bed let out a roar. "Well, two and a half," 

"Are you trying to be like Sun Wukong?" Seele teased with a grin, appearing beside the Dragonlord of Dragon's Doom in a flurry of butterflies and poked his cheek. 

"Hey! Sun Wukong is a hero of a lot of children!" Issei said with a grin. "But no, I prefer being my own person," 

-=-=-=-

"Is Issei Hyoudou here?" 

"Kiba-kun!" The numerous girls attracted to the Blonde knight of Rias Gremory swooned at his entrance to the room. 

The perverted Dragonlord blinked as he heard his name come out the Knight of Rias Gremory. He felt bad threatening the members of the Occult Research Club, they were good people but he was more focused on protecting Mei at the time. 

Sharing a look with the Dragonlords of the Blazing Void and Storms, Issei stood up. 

"What is it?" 

"President Rias would like to speak with you," 

"Why?" 

"Your resources about the occult have interested her," 

"Fine..." Issei stood up, ignoring the commotion of his classmates, and followed the knight. While he had no weapon with him, his mastery of light-based magic would be enough to take care of any Devils that he fought due to their innate weakness of light.

Walking down the hallways, Issei ignored the awkward silence between him and the knight. 

"So, you only use Western-style swords? A bit of a waste, don't you think?" 

"What do you mean, Hyoudou-san?" 

"Well, western-style swords are good for general purposes but a rapier will be better at stabbing, Katanas for cutting, and so on. As you are now, you're limiting your full potential," 

"I appreciate the suggestion, Hyoudou-san. But I have a mission to do," 

It was faint but for a Soulweaver like him, it was easy to see. Hatred filled the young Devil in front of him. A hatred he knew that threatened to swallow a person alive, similar to an old friend. Konnan, blinded by grief, relied on his hatred and it destroyed him. He is still alive, trying to redeem himself but the scars he brought onto others and himself were far too severe. 

"Piece of advice," Issei said. "Hatred is a fire that will destroy you and everything you love if it consumes you," 

"What do you know about it?!" Kiba snapped, turning to face the Dragonlord of Dragon's Doom only for him to recoil at the sad face of the Dragonlord of Doom. 

The death of his dragon-slaying mentor and friend, Demento, ignited a hatred against Konnan at the time and it led to his massacre of fire dragons, plasma dragons, and other fire-wielding creatures including mages opposed to their side. It was only after he almost destroyed his relationships with others that he snapped out of it but the damage was done. He already developed the deadly Great Fire Dragon-slaying magic he became famous for. 

"A lot," he said with a smile as the Dragonlord's eyes glowed blue for a split-second. 

Arriving at the club room, Issei blinked as he saw a blonde-haired man in front of him showing a mix of fire and darkness-based magics similar to some creatures he fought before. 

"Ah, Issei, sorry for the trouble but something came up," Rias said with a smile.

"And who is this human, Rias?" The man said with a cocky smile. "Riser does not wish to see any man getting close to you," 

"Riser... this is my underclassman, Issei Hyoudou. We were supposed to have a meeting today," 

"Riser does not care. Riser only cares for the engagement between us and our marriage. Our marriage is a contract between our parents to replenish the numbers of our pureblooded kin."

"For the last time, Riser! I will not marry you," 

"This is new," Issei whispered to himself as he looked at the tense argument between them. 

"Very well, if you won't listen then," A fireball enough to kill a man formed on the arrogant man's hand. 

"Brother, don't!" A girl with blonde hair tied in a pair of drills shouted. 

'Huh, never thought I'd meet anyone with Bronya's hairstyle,' The young Dragonlord thought as the fireball approached him. 

Kiba, who went to Rias' side moved, using his speed as a knight to try and get the human out of the way. 

In an instant, the fireball stopped and floated in Issei's palm shocking everyone in the club room. A low whistle echoed inside as the young man observer the flames. 

"This is impressive," Issei whispered before pressing the ball of fire in his mouth and swallowing it in one go. "Not bad... not bad at all." Turning to the blonde-haired man, the young Dragonlord let out a draconic-looking grin. "It's rare for something other than a dragon's flames to taste this potent. You have the potential to be a powerful pyromancer," Praised the Dragonlord of Dragon's doom. 

"What are you?" 

"But since you attacked me," 

Blue flames roared in his left arm, covering it like a gauntlet. In a cyan flash, Issei disappeared. 

For as arrogant as he is, Riser Phenex, a descendant of one of the 72 Devil clans found himself on the wall of his fiancee's club room and a burning feeling on his chest over his heart. 

Issei Hyoudou stood with a hand on the Phenex's heart and without missing a beat, his teeth chomped and devoured on the still-beating flaming heart of the Phenex family. 

Riser's body healed, regenerating his heart, flesh, and ribs, but a scar remained. His eyes remained fixed on the form of the man that brutally removed his heart in one blow and it filled him with fear. He, a pureblooded devil of the Underworld and scion of one of the strongest families was harmed by this human?

"Flexing fire-based elemental magic won't work on me," The voice said as Issei's form became distorted for him. Fear... fear of a single human filled his entire being. It was impossible! How! How can a pureblood like him be threatened like this?! But if he fought, he would die! 

"No!" The small back of his little sister and his Queen filled his vision. 

"If you want to get through Lord Riser, you will have to go through me!" Yubelluna, his queen announced. 

"And us," One by one, the rest of his peerage appeared, blocking the path between him and this monster. 

One by one, they prepared their weapons and magic as they looked at Issei. Riser looked at them and felt a warmth on his chest... how long... how long has it been? 

'Lord Riser, I swear to follow you with my life,' 

'Big brother won't lose! He's the strongest person I know!' 

'That's right... I'm their king... I can't lose like this,'

The legendary flames of the Phenex family bloomed from his form, burning away at his clothes and blood. For the first time, a desire burned inside the heir of House Phenex, fighting through the fear. He wanted to get stronger to face this thing...

"Heh! You're all fired up, now huh? Fried chicken?" The voice of the thing in front of him said. In an instant, the orange flames of House Phenex bloomed, fueled by ambition and desire to stand strong, met with the blue flames released by the young man in front of him. 

"Infernal slayer magic," In contrast, fueled by excitement, Issei reached deep inside his soul and looked at the seal in front of him. The seal belonged to the Slaying magic he developed to try and combat the infernal of flames, Wargoth. The strongest form of Slaying-based magic that he had, enough to even contend with Wargoth. 

The blue flames slowly turned to ice as the temperature around them plummeted to very low levels in an instant, causing the breaths of those inside other than him to turn white. 

The once-bright flames of House Phenex's son dimmed as the temperatures lowered. The cold air generated a mist that hid the body of the Doomed Dragonlord, only allowing the blue eyes he currently had to pierce through the mists. 

"Re—," 

"Can someone explain to me what is going on here?" A magical circle formed and appeared in between the Dragonlord of Doom and the peerage of Riser Phenex. A beautiful maid landed in front of them flanked by a woman with hair tied into a pair of twin-tails. 

In an instant, Issei felt the power difference between him and the woman. Even with his true form and age, using all his powers, the best he could do was possibly force out a draw between him and this maid. 

"YOU!" The black-haired twin-tailed girl dressed like a magical girl immediately called out. "HOW DARE YOU DO THIS?!" 

"The fuck you talking about Midget?" Issei asked, looking at the shorter girl. 

"HUH?! HOW RUDE ARE YOU! YOU THIEVING HUMAN!" The girl shouted, ignoring the insult. "YOU DARE DO THIS TO ME! I AM SERAFALL LEVIATHAN, ONE OF THE FOUR RULERS OF THE DEVILS!" 

"Impressive, and you managed to do that with your adorable face?" 

"Hehe~, good... you know my charm. Wait! NO IT'S NOT ABOUT THAT"

"Is this about me trying to make that Fried chicken into my next meal? It might count as Cannibalism but its been a while since I last ate a fire elemental," 

Hearing this, Riser flinched. It... it wasn't even a fight to him but a hunt? 

"NO! You can eat him if you want," 

"Serafall..."

"I'm here because you stole someone from me," 

"Impossible! I may be an honest-to-god pervert but I will never commit NTR," Issei proudly announced.

"Bullshit! You stole my beloved So-tan from me!" Serafall shouted before pulling out a wallet and opening it allowing a long stack of pictures to fall out from it. "How dare you steal my adorable So-tan from me! Do you know how many times I warmed her bed for her!? How much I'd love to hug her and take all her worries away! to kiss her good night and make sweet love to her!" 

"No, who is this So-tan?" 

"No! I won't let my adorable So-tan be engaged with a bad boy like you!" 

"I'm not a bad boy! I'm a hero!" 

"Necromancy," popped Aegis, looking at him. 

"Hi Mr. Ghost!" Serafall greeted the elemental spirit of Valor with a smile, changing gears before glaring at Issei. "No, this will not stand! I will not let my So-tan be taken by anyone!" 

"Why would I want your So-tan," Issei said, mind racing through numerous possibilities as he held her chin. Forcing his body to return to his true age, the boyish teenage body turned to a handsome man that braved countless trials as he held her chin. Looking deep into her eyes, the Dragonlord of Dragon's Doom smiled as bright as the stars of a clear night sky. "When I can have you," 

"Ah... but I will be such a bad big sister if I stole you from So-tan," Serafall whispered, looking at him directly in the eyes. 

"Then, we can explain it to her. We can tell her that our passion with each other burns bright."

"A-are you fine with an old lady like me?" Serafall asked, voice quivering as she looked at Issei. 'No! Fight on Serafall! You must remain strong!' 

"Old lady? If you're an old lady then I'm a baby compared to you," Issei said with a smile, not noticing the blush forming on the woman's face. "But I can make you my baby," 

"I... ugh..." Serafall Leviathan, one of the heroes of the Devil Civil War blushed as her mind tried to compute what was happening in front of her. Her supposed test backfired on her and now, she was trapped in the charms of this cute— I mean Annoying So-tan Thief! "I might be inexperienced but... please take care of me, Daddy," 

Silence echoed in the classroom as the fear-filled members of both Riser's peerage and the Occult Research club could only look at the Shoujo manga-esque scene in front of them. Serafall Leviathan was blushing up a storm in front of the now older Issei Hyoudou. 

It was a nightmare!

Grayfia was pleasantly surprised. As a friend to Serafall, she always wanted her friend to experience romance but now. Discreetly memorizing the scene in front of her, she coughed into her hand. 

"Can someone please explain what is happening here?" 

After a short explanation and an application of magic to fix the clubroom, Issei sighed as he looked at Riser. 

"I apologize, it's been a while since I last fought someone and I have been used to devouring fire-based elementals after a fight," Issei said as he looked at Riser. After tasting the flames and after not eating enough for a while, he was in a bit of a craze. After calming the powerful ice-based devil, he returned to his current body. 

"I-it's fine. R-Riser is at fault here," The son of the Phenex family nervously said as he noticed how Issei looked at him with hunger in his eyes but he needed to stay strong. He has to protect his sister at least. "But how? Riser is curious... how can you be so strong for a human?" 

"How?" Memories of a small town filled with people who accepted him for who he was. Images of his dragon and the countless friends he made filled his mind. "It sounds cheesy, but it's because I have people I want to protect," Issei said with a kind smile. 

Lady Celestia, the high priestess of Dragons, and someone he looked up to as a big sister trained him in the art of Dragons. 

Sir Vive, his mentor and instructor before his journey took him in. 

"If it's for them then I will risk everything to protect them, no matter what," Issei proudly announced. "You have a good harem, you shitty-ass fried chicken normie," Issei said. "You and them, all have the potential to be better, to be more powerful. It will be a waste to be so weak for this long, to not have the strength to protect them when it counts," 

Memories of Konnan's family that he failed to save during the Great Fire War echoed in his mind. He swore to protect them but he was too weak. Then images of Serenity, the innkeeper of Falconreach, and someone he saw a sister dying only to have her corpse be used as a puppet by the Doom Spirit, Caitiff. And lastly, the image of his best friend and sword brother falling into the core of the void as he could only helplessly watch... they were all just some of the hardships he endured. 

If given the chance... he would save them all. 

"Pardon me," A woman white hair and red eyes appeared from the shadows. "Lord Issei, we have some guests looking for you," 

"Thank you, Luna," Issei said with a smile. "This is my cue to leave, I apologize for the trouble, Gremory-senpai," 

"No, I should be the one apologizing, Hyoudou," 

"See you soon," With those words, the red-eyed young woman glared at Serafall and hugged Issei's arm as the two disappeared from view via a magical circle. 

As time passed by, Rias Gremory sighed. The meeting with Riser took an unexpected turn and seeing her junior immediately dispatch Riser with ease... it terrified her and his true form was more powerful than his current one. 

'Luckily, he took a liking to Lady Serafall,' She thought before her eyes looked at the magical recording from before.

 "Wait a minute," 

She took one look and while she could not see it clearly before, she saw her junior reach and eat the fireball. Taking her phone as fast as possible, her fingers danced and tapped the screen before comparing the two videos side by side. Eating fire... was a sign of Dragon slayer magic from Fairy Tail...

"THE ISEKAI IS REAL!" Rias shouted with a crazed look on her face.

"Ara?" Akeno could only watch as Rias slammed the window open with enough force to break it and shot out flying into the night.