Honkai has existed as human civilization evolves and grows. With warriors bearing their mark, the Stigmata are the only hopes remaining for the human race.

One example is based on a Chinese legend that has been documented by archaeologists and historians in China.

Hime Xuanyuan or rather the Yellow Emperor as the people called her in their hometown the Xianzhou; once wielded a Golden Sword bearing her namesake as she single-handedly fought the Honkai army.

In exchange, she gave her life to seal the demonic Honkai entity known as Chiyou in the deep underworld of Xianzhou. Since then, its Stigmata and its sword only exist in legends and myth.

South Ocean, Guangzhou

Ryusuke's boat, carrying the Schicksal team, has arrived at the location of Xianzhou. He stopped the boat in the middle of the South ocean of Guangzhou where the mainland was 7 miles away from their location.

(A/n: I will nickname Himeko's father Ryusuke as Ryu)

Ryu: Alright everyone, we're here. Now if the legends are true, Xianzhou should be around here. Is everyone ready?

The Valkyries and the Knight have worn their diving gears and their helmets are on their arms, signifying they are ready to dive into the deep waters. Fu Hua suddenly felt a disturbing presence in the water.

Fu Hua: Major, a large cave has been detected below the water's surface, and it contains traces of Honkai energy.

Himeko: Okay, it's time to dive down there and explore it!

Kiana: Wait, what about him?!

Kiana points out Ryu's condition.

Ryu: It's alright, I'm not gonna go down there. Y/n assigned me to guard this place for now until you come back out of water from your deep diving.

Eula: You sure you'll be fine staying here in the middle of the ocean?

Y/n: Trust me, he can handle it. Let's focus on the task we've given.

Himeko seems to be narrowing her eyes about Ryu's stay in the boat, but Y/n assures his own safety when he looks at her. They all jumped down and dived into the waters below leaving Ryu alone on the boat.

Ryu: Good luck down there...

*Opening 2 plays: Blue Bird by Ikimono Gakari*

Kiana is in awe at the underwater's nature gifts such as corals, fish and jellyfish which it was quite harmless unlike some jellyfish would.

Kiana: Woah~! It's so beautiful here!

Himeko: Kiana, what are you doing? Focus!

Eula: Come on, Kiana. You can achieve the underwater beauty when this is over.

They swim deeper further as they reach into some kind of a deep cavern leaving Y/n confused.

Y/n: Umm, Fu-san, where's the cave?

Fu Hua: The readings indicated that it's at a deeper point than this. Meaning it could be right down here.

Himeko: Then let's follow the traces of Honkai energy.

Himekko and the rest go swimming deep into the cavern. Eula can't help but feel like someone's following them as she looked behind her back to watch that nothing's following them except small fishes that are wandering and nothing else. Y/n saw this and asked her.

Y/n: Are you okay, Eula?

Eula: Oh, nothing... Let's go.

Y/n and Eula catch up to the team but Himeko is sensing something in the bottom of the cavern.

Himeko: Wait, hold on... I'm picking up something over here-

But as she's gonna say it, their sensors have picked up multiple Honkai energy readings.

Kiana: Auntie, are those-?!

Himeko: Yeah, I think they've been hunting us as soon as we dived in!

They looked down below the cavern and saw multiple Honkai infected sharks swarming towards them.

Eula: Honkai Beast sharks! A swarm of them!

Y/n: Then turn on your jets and bail away from them!

They all activated their propulsion jets and blinded the beasts for a while but they got agitated and started swimming faster towards them.

Eula: At this rate, they're gonna catch up to us!

Kiana: Are all the fish here corrupted by the Honkai energy?!

Y/n: Well, some of them, like these predators here!

As they continue to increase their speed but so do the sharks but Himeko notices something out in the distance. A shipwreck with a builder splitting the ship in half. This gave her an idea.

Himeko: Wait, I have an idea! Follow me! *swerves to the right*

Kiana: H-Hold on, Auntie! Where are you going?!

Himeko: There's a wrecked submarine over there.

The rest follows behind her as she explains the plan.

Himeko: If we can lure these beasts in there and smash the boulder underneath the hull we'll be able to trap those bastards in there!

Y/n: Well the problem is we don't have explosives. Even if we do, it's not enough to break the boulder.

Himeko: Fu Hua, Eula. I'm leaving this to both of you!

Fu Hua: Understood. But we'll need at least 3 minutes to get ready.

Kiana: Fighting off a bunch of sharks in there for 3 minutes should be easy-peasy!

Y/n: Need I to remind you these guys can eat a whole human in just 7 seconds?! So stop fooling around for now and prime your guns!

Kiana and the others went in as Fu Hua and Eula are about to get away from the beast's attention through Kiana and the rest's wreaking havoc to their hard shelled armors.

Kiana pulls out her Mosin Nagant twin pistols and Himeko draws out her Crimson Queen great-sword and Y/n draws his GN Blades he managed to get before he left to join their mission.

Kiana: Come at us, you stupid fishies!

As Kiana fires the sharks growls as Eula and Fu Hua manage to sneak out to aim their position at the boulder as the three are swimmed around the ship. Kiana kept firing her pistols at them until they finally reached a dead end.

Y/n: We hit the dead end!

Himeko: Well, Kiana?

Kiana: Good news, they've followed us in!

Himeko: Then, we'll just have to hang on for three minutes.

Meanwhile, in front of the boulder is the floating Fu Hua and Eula.

Eula: Fu-san, let's do this.

Fu Hua: Yes... We just need to focus...

They calmly breathe to launch their one shot attack to destroy the boulder. Back to the three, Himeko botched the Shark as she kicked it back and it growled in anger and pain. She then created a spin vortex attack as multiple sharks were coming towards her.

However a shark behind her is about to get the jump on her but Kiana kicks it away from Himeko and points its pistol towards its eye, firing its bullets at the beast, blinding it. She then keeps firing at the other beasts that pass through Y/n's attacks.

Kiana: There's no end to these damn animals!

Y/n is slaughtering the beast around him as he starts the first one who tried to bit off it's legs but he double ax kicks it as he throws one of the blades it's top head killing it and he stands on top of his sword like a master swordsman waiting for it's next opponent to make its move.

Himeko: Fu Hua, Eula, are you ready?! Please respond!

The two beast tries to bite him off in half as he puts the sword at the other beast's open mouth making it hard to bite down the sword as he uppercuts the other one and forcefully closes the beast's mouth from the sword stuck on it's jaws killing it. He pulls the sword out and kicks the corpse out as he gets off his blade and picks it up with his right hand, finishing off the last shark by slicing its underbelly.

He then gets back to the two girls as they are on each other's back being surrounded by more swarms of sharks. Y/n shouts at the two girls who're still on the boulder.

Y/n: Fu Hua, Eula, anytime now!!!

Fu Hua and Eula's eyes are now wide open and serious as Eula's Nitro Crystal greatsword glows and Fu Hua's fists glowed in gold color.

Fu Hua & Eula: Right there!

They both unleashed their attack at the boulder and it results in a success of trapping the sharks in the shipwreck.

Above the waters is Ryu watching the radars as he eats his own cup noodles. But suddenly, his relaxing watch has turned immediately into trouble as the radars have picked up something.

Ryu: What have you found, my good sensory radars?

He zoomed in towards the camera of a sensor located towards where it caught a presence in it. A symbol of Anti-Entropy scouting ship, in the shape of a swan boat.

Ryu: What the hell? Who's driving it? *zooms in*

In the swan boat is the maniac Sin Mal, kicking the swan boat from her boredom and impatience.

Sin Mal: Damn it!! We agreed to meet here, but he hasn't arrived yet! How long does he expect me to wait?! It's been two goddamn minutes!!

Ryu just heard all of that from his comms and was now terrified as she spells disaster for all who encountered her before.

Ryu: Uh oh, the boss needs to hurry, the crazed girl is here.

As if his thoughts of trouble couldn't get any worse, the sensors have picked up something else. A ship that was from Schicksal and it looks like Y/n isn't the one who called them.

Ryu: Oh no, those idiots...!

Sin Mal turns to look to her left and sees a Schicksal ship coming through. She has a wide grin on her face everytime she sees something belonging to Schicksal.

Sin Mal: Ah, I see how it is.

In the Schicksal ship, a lot of girls are now preparing for the dive as well.

Valkyrie 1: According to Himeko, she and her team have already dove underwater to look for Xianzhou. We'd better hurry up and provide support.

Valkyrie 2: There's a strange ship over there! That crest...! It's an Anti-Entropy ship!

Sin Mal jumps out of the boat from the top and begins to hunt the Valkyries.

Valkyrie 1: Fire at will! Don't let her get anywhere near us!

Sin Mal: Go to hell! Death to Schicksal!!!!!

Ryu can see the carnage as he saw her cutting off the girls' body parts with her rapier like it's nobody's business. Ryu starts to pack up his things as he can see Sin Mal is finishing her business in the boat of Schicksal.

He packs his weapon and communication devices as he gets down to his ship and into a secret ship. He turns its lights on and enters his escape boat that was clamped by the clamping device, the CB Spaceboat. 

He puts his stuff that is in his backpack beside its pilot seat. He presses the specific buttons, flips specific switches and turns the power on to the engine as it's now powering on in a loud hum.

As he sets the coordinates in he hears a thud on his hull as he holds onto his seat and fastens his seat belts. He looked up to the wind shield and saw the crazed grin of Sin Mal up close to the windshield as he yelped in fright .

Sin Mal: Where are you going, Schicksal?!

Ryu: Schicksal, hell no I'm not!

He flips a switch to turn on countermeasures and it electrocuted her but she wasn't fazing at all. She was just laughing at it.

Sin Mal: HAHAHAHAHAHA!!!!! You think this will work for me?!

Ryu: Well, how about mixing it up with a flamethrower?!

Ryu presses a button and it blows the lame thrower towards Sin Mal. She suddenly screams in pain from the two element combo result: Overload effect.

Sin Mal: It hurts!!!! My body is exploding too much!!!!

Sin Mal dropped into the water as she tries to ease the pain. 

The ship-boat is ejected and now drops into the water and the ship's thrusters have turned its propulsions 180 degree angle and goes underwater to get out of the ship.

[Intermission: CB sub-boat]

This space boat of the Celestial Being is the aquatic version. It can be set to sub mode and boat mode.

Sub-mode is for underwater exploration and boat mode is for above water exploration. Its speed is on the high speed of the speedboat and a low speed of the submarine combined.

It only has a limited arsenal such as decoy torpedoes, flash flares, small flamethrower and electrical force field.

[End Intermission]

Back in St. Freya, Theresa is checking survey papers from Schicksal as she organizes the first stack of paper and puts it on the cabinet below her. But then her office door opens as the informant from Hyperion arrives.

Informant: Principal Theresa, I have an urgent report that just came in.

Theresa: *stands up on her chair* What is it?

Informant: We've just received a report that the team we sent to aid Himeko was just slaughtered by a scout from Anti-Entropy. In coincidence, we recieve an anonymous tip about the Anti-Entropy coming after the team to obtain what the team's mission is.

Theresa paused and was troubled by this and jumped out of her seat to grab the cross behind a closet.

Theresa: Inform Mei and Bronya that we're moving out to save Himeko and Kiana, immediately!

In the dormitory, Mei just finished washing the dishes and Bronya also finished wiping the kitchen. But suddenly Mei's tea cup that she was cleaning accidentally let go of her hand.

Mei: Ah!

The tea cup broke and as she looked at it. She can't help but feel that trouble is amidst Kiana's mission.

Mei: Kiana... Please be alright.

Bronya suddenly received a message containing big red capital words: [URGENT MISSION].

Guangzhou South, China

In the bloody ship of Schicksal, Sin Mal's body is covered in betadine after feeling the overload effect from Ryu's space-boat.

Sin Mal: Damn it, damn it, damn it!

???: I didn't know you would be covered in antiseptic solution after you cleared things up here.

Underneath the battleship is a hidden ship that levels below the Shcicksal's and not letting it collide.

It opens a hatch tunnel out of the water and finally opens up to reveal a man wearing a black trench coat with purple polo shirt underneath and wearing glasses, coming out of the tunnel. This man is named Ryougi, an arrogant commander of one of the AE ships.

Ryougi: Did your mother teach you to bathe yourself in antiseptic solution? Ever thought about starting as an idol, my little sheepdog?

Sin Mal suddenly dashes towards him as Ryougi has a cocky smile and holds and redirects the tip of her rapier beside his face with just his index and middle fingers.

Ryougi: Oh my, are you trying to stab your commander in this operation? Is this treason I see?

Sin Mal: F*** off, you old fart! Secretly watching me like that... You're gonna pay with your life!

Ryougi: You never turned your earpiece off. I can't help it, anyways. I heard it all, including those lovely things you said about me while waiting.

Sin Mal: You should be lucky I was ordered by my mother to not kill you for your arrogance...!

Ryougi: All you had to do was take care of some trash... and some loose ends. Could you perhaps make less of a mess in the future? Bah, what am I saying, I love it when the floor I walk on and land on is covered in flesh and blood!

Then one of the Schicksal walkie-talkies sends out a distress signal and the two notice it.

Ryougi: You let her send a distress signal back to headquarters before she died. Schicksal is going to send backup any minute now... What a drag.

Sin Mal: *destroys the walkie-talkie* Who cares?! This means there'll be more people for me to slaughter! Everyone in Schicksal will go to hell! Now stop wasting time, we should get started with the next phase of our plan!

She jumps down to get into the water to find Himeko and the rest.

Underwater Guangzhou

Back deep into the sea, the ship's pieces are now connected as the boulder is destroyed, trapping every shark that is in the ship. Deep beneath the hull, a GN Blade pierces through and creates a pentagon slice and Y/n kicks it with his reinforced boot provided from his diving gear. The three come out of the hull and Himeko compliments Fu Hua and Eula.

Himeko: Well done! Those beasts won't be bothering us anymore!

Y/n: Thanks for that save, Eula!

Eula: No problem, Y/n.

Y/n suddenly receives a notification on his private comms and it opens up a message.

To Y/n:

A bloody Schicksal ship is here with Valkyries dead and a member of Anti-Entropy, Sin Mal is above your location. I managed to escape them but I feel like they are in a hurry for something as Sin Mal is waiting for something to tell them about my involvement.

What should I do now?

To Ryu:

Call the team in, and rendezvous to your position. I would bet that Hyperion is on the way too to intercept AE. You all gear up and begin armed intervention against the AE. And also... prep the Devise and Astray mobile battlesuits.

To Y/n:

Thanks for the info, Y/n. I placed a tracker to Sin Mal to know where she is. I bet Hyperion would notice it too. Just hold on a little more, boss. We're on our way.

Y/n is now typing something as it was priming a suit in 5% preparation and counting up but he notices something else; he's getting that same energy reading once again. His teammates noticed that Y/n was typing to his navigation as Fu Hua asked him.

Fu Hua: What is it, Y/n?

Y/n: I'm still tracking the Honkai energy readings we discovered before. And it's right over-there! Just pass that chasm.

He points to a chasm to their left if it's on Y/n's perspective and pointing at.

Himeko: Then let's go and find what we're looking for over there.

They all followed Himeko as they cautiously swam through the dark chasm. Kiana is looking around the chasm until when she turns her head in front, she sees something that shocks her.

Kiana: Umm, is that where it's tracking at?

Y/n: Yeah, it should- Oh, my goodness...

They are now looking at a gigantic body of a Honkai beast with it's maw wide open, being the only entrance towards the center of the Honkai energy readings he detects.

Y/n: 'That ginormous beast is almost the same size as Quiet Zero...! Is this really Chiyou?!'

Meanwhile, Ryu's sub-boat has arrived and entered a dark ship that has been floating underwater. It docks in and Ryu gets out, breathing well as Yae Sakura, Kallen and Rin meet up with him.

Kallen: Welcome back, Mr. Ryu.

Rin: Are you okay?

Ryu: Well, after almost being killed by a psycho AE kid, I'm fine... kinda.

Sakura: *snorts a little* Alright, if you say so. So what's the plan now from Y/n?

Ryu: Y/n said that it's time to gear up.

Kallen: You mean...

Ryu: That's right. We're entering the battlefield again, Ms. Kallen. And he says to prepare the Devise battlesuit.

Sakura: Alright, time to cut down the corruption and conflict in this world once again. I'll go make checks for the REIV battlesuit.

Rin: I'll get Kyrios ready for deployment.

Kallen: I'll inform Haros to set up my battlesuit and the Devise.

Ryu: Alright, good. *reveals his CB uniform* Time to break some Anti-Entropy arse.

The ship turns on and reveals the design of the ship Ryu and the rest of the crew are in. 

This ship is the Ptolemaios II in diving mode and powering its large GN Condensers on and the ship is now moving out towards where AE and Hyperion will collide. 

Somewhere in the ship, is a dark hangar with a new arsenal: a pair of mini flaps with a green bladed buster sword attached to a drive backpack for a certain Gundam.

Another is a new Gundam battlesuit in its mobile suit mode. It lays asleep there, waiting for its new Meister.