(3 Days Later)

Kirigami: My back... Did you really have to do that?!

Kirigami finds himself in the treatment room, nursing wounds inflicted by Kagerou, who has proven to be a formidable opponent. In this moment of reflection, Kirigami grasps the immense strength that comes from over two decades of Kamen Rider experience. Earlier, he had just completed a grueling training session with Kagerou, designed to challenge him without relying on Quirks or the Rider System. Despite Kirigami's extensive training in martial arts and swordsmanship under Ei's guidance since childhood, Kagerou's deep understanding of Ei's techniques rendered Kirigami's skills ineffective.

Kagerou: No pain, no gain! That's what my father taught me when I was young. And it's also something I learned during my time as Kamen Rider.

Kirigami: So, Kage-sensei.... how long has it been since you became Kamen Rider? 

Kagerou: 25 years. Sooner than you a year.

Kirigami: And... why did you say that Nexus is your original Quirk?

Kagerou: You still remember the "Super Soldier Nexus" experiment, right?

Kirigami: Well obviously! I'm the only survivor.

Kagerou: But have you ever wondered why they have a sample of the Quirk Nexus?

Kirigami: Well.... no...

Kagerou: Then we have to go back to the year when I was 19 years old. At that time, you had not yet been caught in the experimental facility. While returning to Japan, I was assassinated by Todoroki Koichi and Yaoyorozu Akemi. Even though I was still alive after that day, with them having a sample of my blood and me being seriously injured, I had to go to England to hide for a while.

Kirigami: Since I was 4... and... still remember about my parents...

Kagerou: Yes, if I hadn't been assassinated then you wouldn't have had to go through that hell on earth.

Kirigami: Sensei, it wasn't your fault. I mean... If I didn't have this Quirk, I probably would never have met Mom, Auntie Makoto, my team... even... Ayaka.

Kagerou: "Smirks" Thinking about your girlfriend, huh?

Kirigami: "Blushes" Sensei, shut the hell up!

Kagerou: By the way, I have heard about Ei's bounty. $7,000,000? Still little!

Kirigami: Then what about yours?

Kagerou: "Shows him the Wanted Poster" Dead Or Alive. Cronus. $2,300,000,000!

Kirigami: What?! 

Kagerou: As the trio of heroes at the top of the world rankings, the bonuses for hunters will also be higher than for domestic heroes. I have $2,300,000,000, meanwhile, my two seniors, also known as Crystalline a.k.a No.1, have a total of $10,000,000,000 and Asle, No.2, have a total of $2,700,000,000. So combined, the three of us are worth $15 billion.

Kirigami: Holy fuck!

Kagerou: Now put on your hero costume, we're gonna patrol. 

Kirigami: Ay aye, sensei!

Kirigami grabs his case and goes to change. After 5 minutes he got ready.

Kirigami: I'm done. 

(Kirigami's Hero Outfit, Version 2. After the USJ event)

Kagerou: Looking good, kiddo.

Kirigami: Thanks.

Kagerou: Before we patrol, I want to know your hero's name.

Kirigami: I still use my name when I was a vigilante. Twilight Swordsman.

Kagerou: Not bad. Get the bike!

Both Kirigami and Kagerou have summoned their motorbikes. 

(Diagospeedy - Kirigami)

(Boostriker - Kagerou)

They charged out into the street, ready to patrol. But as they moved forward, they were ambushed by the very creature that had assaulted Kirigami at USJ. Drawing on his past experience, Kirigami recognized its vulnerability. He lifted his right hand, mimicking the stance of a gun, and unleashed a powerful beam of energy straight into Nomu's brain, igniting it in flames.

Kagerou: What the fuck is that thing?!

Kirigami: Nomu, an experimental corpse. By...

Kagerou: "Telepathy" All For One huh?

Kirigami: "Telepathy" How do you...

Kagerou: "Telepathy" I sensed a part of his Quirk on your body and from that thing. Got anything to say about it?

Kirigami: "Telepathy" I will tell you later.

They then saw Hosu City covered in flames.

Kirigami: That smoke came from Hosu City!

Kagerou: Then let's change locations!

The duo sped on their motorcycles towards Hosu City to aid fellow Heroes battling the Nomus. Suddenly, Kirigami's phone buzzed with a notification. As he checked the message from Midoriya revealing his location, Kirigami sensed trouble brewing.

Kirigami: Cronus-sensei!

Kagerou turned to Kirigami

Kirigami: Permision to leave. Someone from my school might be in danger.

Kagerou: Permission granted. But be careful.

After receiving permission, Kirigami drove quickly to the location that Midoriya had sent him. Kirigami landed on a building

???: You're going to die like your brother should've. A fake!

Kirigami: "Thought" Found you!

He followed the voice and found Stain with Iida under his foot

Stain: A hero doesn't take the revenge path!

Iida: "Thought" No I can't die here!

Stain: Say goodbye!

Kirigami: No you don't!

Stain blocked Kirigami's katana

Stain: Another fake hero!

Iida: Raiden? What are you doing here?!

Kirigami: What does it look like? Saving your dumbass!

Iida: Stop! He's mine to take down!

Kirigami: Would you stop and think? You think your brother wants you to be here! He would rather be in a wheelchair than you be dead!

Stain: Listen to the kid. He has a point.

Kirigami pushes Stain away

Kirigami: Taking revenge is not fit for a hero. That's only for those who know what lies ahead like me, an Anti-hero! And that's even more pain! You shouldn't have let your emotions get in the way!

Stain: Enough talking!

Kirigami: Then let's begin!

Kirigami and Stain charged towards each other, slashing their blades in a fierce battle. He notices the care of Stain's blade.

Kirigami: You let your blade get dull from the blood!

Stain: Their blood gives some power!

Kirigami: You're a disappointment as a swordsman. You should never let your blade get dull!

Kirigami deflected the strike, creating an opportunity. He cut into his opponent's side, drawing blood. As he moved in for a follow-up strike, Stain managed to evade a few feet away.

Stain: Not bad. But you are in no place to say about my blades faker!

Kirigami: Faker? What's that supposed to mean?

Stain: Every hero. Nowadays heroes just want money and fame. All Might is the true hero. He always puts his life at risk and gives hope!

Kirigami: So you share the same opinion as me huh? 

Stain: That's why I only allow him to kill me.

Kirigami: Well sorry but that won't happen! 

Stain: Nobody is killing me besides All Might!

He rushed at Kirigami and swung his blade. Izuku dodged left and right. Iida began to move slightly.

Iida: I'm such an idiot. I let revenge cloud my mind.

With a gradual rise, he gazes upon Kirigami locked in combat with Stain. Observing Kirigami closely, Iida comes to the stark realization that their motivations for seeking vengeance were worlds apart. Iida's brother is still alive and he still has relatives, while Kirigami has gone through hell as an experimental guinea pig and experienced the helplessness of having to watch his friends die before his eyes when Kirigami couldn't do anything.

Kirigami deflected Stain's sword strike before countering with a swift low sweep that sent Stain crashing to the ground. As Kirigami attempted to bring his blade down on Stain's head, the latter narrowly evaded the attack, leaving a gash on the side of his face.

Stain: You got skill. Why don't you join me in eliminating the fake heroes?

Kirigami: Sorry but no. I have my own ways... Ways of Anti-Hero!

He put his sword up but suddenly ice blocked Stain in.

Kirigami: Took you long enough.

Stain hurled a knife towards them, only for Todoroki to swiftly counter it with his ice. Stain leaped over the ice barrier and launched an attack, but Iida intervened by kicking him into a nearby building. Stain recovered quickly and deflected Kirigami's sword strike. The intense exchange of blows continued, wearing Stain down. He found himself evading Todoroki's ice and fire assaults, dodging Iida's kicks, and parrying Kirigami's strikes. Stain soon found himself trapped against a wall, struggling to keep up with the relentless assault.

Stain: "Breath heavily" Damn you!

Suddenly the ground shook

Iida: What was that?

The ground shook again

Kagerou: "Telepathy" Twilight! We have a problem!

Kirigami: "Telepathy" What is it?

Kagerou: "Telepathy" Jyamato and Megid!

Kirigami: "Telepathy" What?! How many?!

Kagerou: "Telepathy" A regiment with both of them!

Kirigami: "Telepathy" Shit! Sensei, start to evacuate the people! I will be there to help!

Kagerou: "Telepathy" I will buy you some time.

Kirigami: "Telepathy" Got it sensei. "Talks" Stain it's your lucky day. You can go.

Stain: What?

Todoroki: Are you serious?

Iida: But he's weakened. We can arrest him!

Kirigami: We have no choice. A lot of Jyamato and Megid just show up and I have to get over there.

???: Leave him to me.

They look up to see an old man standing on a ledge

Midoriya: Gran Torino!

GT: Leave Stain to us, Twilight, you go and help Cronus right now.

Kirigami: Thank you, sir.

He then runs out of the alley. GT lands on the ground and deals with Stain. Kirigami summons his second cycle and goes to Cronus's place.

(Malvado Continuar Velocista/Evil Dragon Speedor)

Kirigami immediately rushed to Cronus's place and saw...

(Shimi X 500)

(Pawn Jyamato X500)

Kirigami: Those are...

Cronus: Jyamato, monsters grown from a special type of plant of unknown origin. Inspired by the chess board, they will be divided into pawns, knights, rooks, bishops, kings, and queens.

Kirigami: And I think that you know what we will need to do right?

Cronus: "Smirks" Right!

They then take out their Drivers

(Desire Driver)

Driver: DESIRE DRIVER!

(Jaken Caliburdriver)

Kirigami takes out Ankokuken Kurayami along with a Wonder Ride Book and activates it.

(Ankokuken Kurayami)

(Jaou Dragon Wonder Ride Book)

WRB: JAOU DRAGON!

WRB: JADOU WA KIWAMETA KURAYAMI WO MATOI AMATA NO RYUU GA HIMETA CHIKARA WO KAIHOU SURU... (Release the power hidden by many dragons clad in the darkness of ultimate evil...)

He then scans it on the Seiken

Ankokuken Kurayami: JAOU READ!

Then Kirigami put it on the Driver while Kagerou took out his other ID Core and put it on the socket

(Buffa Core ID)

Kagerou then takes out 2 Buckles and inserts them on both sides of the Driver

(Fever Slot Buckle)

(Zombie Buckle)

Desire Driver: SET! FEVER!

Kagerou uses his left hand to make a right-hand motion before shaking his hand and raising his hand up and out.

Kirigami+Kagerou: Henshin!

Kirigami slam the sword on a button in the driver and Kagerou activate his buckle

https://youtu.be/GEyISgpFbNo

Ankokuken Kurayami: ANKOKUKEN KURAYAMI! JUMP OUT THE BOOK, OPEN IT AND BURST. THE FEAR OF THE DARKNESS. YOU MAKE RIGHT A JUST, NO MATTER DARK JOKE. FURY IN THE NIGHT! JAOU DRAGON! DARE MO NOGARE RARENAI... (Ankokuken Kurayami! Jump out the book, open it and burst. The fear of the darkness. You make right a just, no matter dark joke. Fury in the dark~! Jaou Dragon! No one can escape...)

(Kamen Rider Calibur Jaou Dragon)

https://youtu.be/YlwzEL8aklo

Desire Driver: ZOMBIE! HIT! FEVER ZOMBIE!

(Kamen Rider Buffa Jyamashin Zombie)

(Not my art)

(A/N: The reason why many parts of Kagerou's armor are golden instead of just the scarf hanging on his waist is that Kagerou has had more experience and those golden traces are Kagerou's development.)

Calibur+Buffa: WWWWRRYYYYYYAHHHHH!

Both Calibur and Buffa madly rushed into the middle of that monster regiment. Because Buffa is strongly enhanced with the "Invincible Warlord" ability, no attack can hurt Buffa, and it can even be reflected back to its owner. Because Calibur does not have the same ability as Buffa, he can still take damage, but with the ability to recover acceleration, it has contributed to filling the special skill gap. 

When the other heroes arrived after they had evacuated the population to a safe place, they saw Calibur and Buffa slashing monsters continuously without stopping. And of course, there were two women standing in the distance looking at the Kamen Riders with hungry eyes.

Ei+Ayaka: "Thought" I'm wet!

Realizing that the monsters were getting more and more crowded, Buffa and Calibur decided to end it all in one go. Calibur takes the WRB out of Drive and Scans it onto Ankokuken Kurayami. 

Ankokuken Kurayami: HISSATSU READ! JAOU DRAGON!

Buffa pinned his weapon to the ground and pushed the Deadly Pump part to the limit.

(Zombie Breaker Poison Charge)

Zombie Breaker: POISON CHARGE!

Buffa activates Feverslot Buckle and Calibur along with Buffa press the trigger on their weapons

Ankokuken Kurayami: KURAYAMI HISSATSU GEKI! SHUTOUKU ISSEN!

Desire Driver: GOLDEN FEVER VICTORY!

Zombie Breaker: TACTICAL BREAK!

Calibur: Kurayami Hakai Giri! (Darkness Destruction Slash!)

Buffa: Shin'en no Wazawai: Shuumatsu No Doku (Abyssal Mayhem: Doomsday Poison!)

Calibur charges Ankouken Kurayami with dark energy and summons four golden energy dragons to block the monster. Calibur then swings the sword, summoning a larger purple-energy dragon that pushes behind the golden dragons in order to overpower their attack. The five dragons then strike them, resulting in an explosion. The Zombie Breaker's chain rotates and is covered in purple energy as Buffa swings the weapon into a falling enemy, releasing orange energy upon impact. Buffa's claws were also filled with poison. Buffa then swings the saw diagonally twice forming an X shape and swings his claws horizontally from the left and up and down vertically. All those energy scratches and slashes flew toward the monsters, causing them to explode immediately.

See you at: Volume 23: The Hospital. Hidden Relationship