Journey Through the Apocalypse (Honkai AU)

Chapter 10: Blue Dashing Bullet

After the shock wave of the explosion, Kamen Rider Diend Forever emerges from the dust and attacks the abnormality. Diend fires rapidly at the monster with his transformation firearm, he doesn't stop just by standing in place but rather approaching it to hit it directly with his left fist. The creature tries to blast him away with its blaster but it comes in vain as Diend fires a blast directly into the barrel of the blaster, leading to an explosion that destroys several booths nearby. Diend tosses the creature away and approaches his Mei.

"Mei-san, are you hurt?" Diend said in Japanese while kneeling to match the height to their body position.

"I'm fine, Arial-kun," Mei replied in a soft, reassuring tone despite a cut wound on her left shoulder, presumably caused by debris from a wood plank. Diend offered her a hand, but she refused, thinking she could handle it herself. Of course, as a caring person, Arial helped her up and got her out of the area to get her to safety.

"Arial-kun, leave me be. I'll take care of myself." Mei suggested.

"I can't let anyone get hurt again, I want you to be safe," Arial replied in refusal, not wanting her to get hurt again.

While they're running away, the creature gets up and fires a fully powered blast at Diend. As if he knows, Diend inserted cars into his firearm and activated it by pulling a trigger on the pistol grip. Arial princess carries Mei to safety by running at high speed, fast enough to outrun the incoming blast and explosion after it hits a wall next to them previously.

Once far enough, Diend let Mei off him. Arial made sure to fix her wound by applying first aid to it. He needs to be gentle despite the cut wasn't as deep as he thought it to be.

"Arial-kun, I'll be fine. Don't worry about me." Mei tried to assure him again.

Arial didn't listen to her and instead finished applying the aid. He might have overdid by adding alcohol and cleaning her wound several times to avoid any bacterial infection before applying an air-sealed plaster. Mei only stands there accepting his care.

In a short time, her wound is fully covered with the needed aid. Arial is glad for her to be protected. Somehow, Mei felt guilty because of it.

The creature is finally approaching close to them; it flies toward them as if there weren't any gravity holding it down. "Mei-san, run!" Diend said as she activated a card and shot it at her. Her body slowly dissolves, disappearing from the world. Diend gets hit by a rainstorm of anti-matter. He struggles to take all the hits. However, even the unbreakable can broken. Diend immediately gets behind a cover and pulls out two cards from his storage located on his left hip. Inserting one card into his firearm, he pushes the barrel forward for the card to be read.

Valkryie Ride. Sundenjager!

He pulls back the barrel and inserts the next one before once again pushing the barrel.

Valkryie Ride. Lone Destruction: Shadowchaser!

Diend points his firearm upward and activates the card. Two blue spheres are shot out of the firearm and scattered around the area before two figures appear. A white-haired woman fully armed with mechanized high-powered heavy machine guns. She's no other than Kallen Kaslana from another timeline where her tragedy was worse than what happened to her in the main timeline. The other figure features shining long hair with her mercenary outfit carrying high explosives. She's Lantern from the future timeline where she was a part of the long past before the main events even begin.

"Enjoy the Supernova, creature," Diend said as she activated his Blast Card, firing multiple homing shots at the creature.

Kallen and Lantern start firing their firearms at it. Kallen's could fire 5000 bullets per minute, making it a deadly machine gun to punch through the walls of defenses. Lantern's weapons aren't as large as Kallen's. However, it packs with the huge explosion it can do. They fire in unison to incinerate the creature into dust. Kallen's bullets are blocked by an invisible barrier protecting it, however, Lantern's explosives manage to disrupt the barrier slowly due to the massive impacts it caused.

Meanwhile, Hakatsu jumps out of the destroyed booth in a transformed form. Decade attacks the abnormal armed with a blaster on its right arm, he pulls out his blade and tries to detach the right arm of the creature by attempting to cut it in one go. However, the blade was stopped by the abnormal using its left hand. Decade uses his weight to pull it and falls to the ground and throws it upward before firing a shot at the abnormal's chest. The shot creates a sphere around it and multiple shots are fired within it, causing the abnormal to be shredded slowly. Not seeing Kira anywhere, he sees the other abnormal. Worried for Kira, Decade strangles the other abnormal's neck and pulls it away from Kira's destroyed booth. 

"Kira! Are you alright?" Hakatsu said into the booth, trying to find Kira. 

After a short time, the trapped abnormal breaks the sphere and falls onto the ground by its feet. Both Abnormals stand side by side while preparing their blasters to incinerate both Hakatsu and Shigure Kira. Decade couldn't find Kira in time and was forced to focus on the Abnormals. 

"I will tear you both for hurting my partner!" Hakatsu angrily shouts at them.

Kamen Rider Decade pulls out his Herrscher of Reason card and activates it immediately. A beam appears from the sky and shoots Decade from head to toe. Armor parts appear from thin air by breaking the air like glass as if they emerge from another universe. The armor parts merge with his Decade armor. The armor parts are colored in matte white and blue stripes along with orange accents. With this Herrscher form, Decade will be able to create anything he needed as long he understands it. 

A pair of wheels formed beneath his shoes as tough and large wheels. Decade goes high speed with the machine on his back boosting his speed and hits them with hard rams on both of his arms. The Abnormals are sent midair leading them to be shot by multiple blasters appearing from thin air. Decade raises his right hand and snaps his fingers, causing multiple rectangles to crush the Abnormals from outside, eventually making them into one. Once fused, Decade's kick hits the mixed abnormal. However, he didn't stop there. A barrier in the form of a band appears around them. Decade uses the barrier to bounce himself and hit it again. Again and again, he repeatedly kicks the fused abnormally at high speed. 

After hitting it enough, it starts to be destroyed rapidly. Decade activates his Herrscher of Reason Final Attack card and a high pulsing energy charges his right foot. His machine on his back charges at full power and boosts him at Mach speed. Decade hits the fused Abnormal with full power and goes through the abnormal, causing it to explode into multiple pieces.

Decade creates chains attached to his back and fires them at pillars to stop him from accelerating further, it takes him many walls and pillars to fully stop. 

"Kira...!" Hakatsu mutters.

Hakatsu creates a device to scan for his partner, Shigure Kira. Turns out she is still in the same booth. Hakatsu enters the booth and finds Kira sitting against a metal pillar, he immediately heads towards her and checks her condition. Turns out she only went unconscious due to a concussion. However just to be safe, Hakatsu applies a medication to her head. After carrying Kira towards the exit of the booth, Hakatsu summons his bike and both of them ride their bike to head to Hakatsu's makeshift base.  An explosion is heard from a distance by Hakatsu. Even when bothered by the chaos that just happened, he had to focus on Kira instead for the moment to ensure her life. 

The explosion in question is actually from Diend Forever's battle with the other abnormal. The abnormal has been significantly weakened and is unable to attack or retaliate now. Diend approaches the creature while aiming his firearm at its head. Kallen and Lantern only stand behind him as if they act by his command. 

"No matter what problems might be ahead,"

Arial puts his finger on the trigger.

"Nothing will disrupt the love between us, Arial and Mei."

After saying such a line, Arial shoots its head. The creature disintegrates into ashes and disappears into the sea of atoms. Kallen and Lantern disappear into the air as well because their duty is finished. Arial lowers his gun and disables his armor. He smiles as he has succeeded in protecting Mei. However just a second after the victory, Arial felt immense pain in his stomach and right shoulder. He didn't notice some part of his armor broke off due to the rapid attacks the creature did. 

He falls onto the ground and his vision starts to blur. In the distance, he sees someone who seems to be Mei running towards him. 

And then, nothing.

He blacks out.