Outside the Police Station

Heroes and the police force are gathered to have a small briefing of what will be happening today. The location of Eri's whereabouts are the top priority of the heroes, of course, having to identify the enemies quirks is a must.

Jack: Loving the new costume by the way.

Senkai: It's better than the old one, considering if you want to be the cooler version of your classmate. What was his name? Shinso always talk about that guy.

Both of them complimented the H/C haired teen as he just let out a small chuckle.

Y/N: Thank you, I am flattered really. But we need to focus up, there's no telling what quirks have in store for us.

He said as Kado started to walk up towards them in his costume. His costume consists of a cyan shirt with red spots and a black blazer on top of it, black jeans, and a pair of red sneakers.

Kado: Y/N's right. We need to keep our guard up at all times.

Y/N: However, if what they said is true that the League of Villains have formed a temporary alliance with the Hassaikai.

He paused as the 3 teens looked at Y/N.

Y/N: Aku would be in the picture as well.

He said as the 2 other teens was silent, but for Kado, he had already knew him from the start. Y/N mentioned him couple of days back and what he was capable of, regardless, they still need to be vigilant.

Aruto: Whatever happens, we are here to help you guys.

Aruto's voice said as the 4 teens looked at their mentor, alongside Aruto, there was Izu, Fuwa, Jin, and Horobi.

Y/N: President?

Fuwa: You didn't think that you guys would be fighting alone did you?

Horobi: That's suicide if you ask me. We're just here to support you.

Jin: Yeah, after all, you 4 are the inheritors of the past Kamen Riders. So, don't die on us.

They said as the Kamen Riders of the Reiwa Era takes a good look at the current Riders of the Heisei Era, knowing that this mission will be important for all of them.

Y/N: Right. Let's do our best everyone!

He yelled as the police, the pros, their classmates and seniors, as well as the other Kamen Riders are now ready to save a life.

Outside the Shie Hassaikai Fortress

Policeman: Once they've read the warrant, charge in! I'm counting on everyone to move swiftly.

He said as Rock Lock started to complain as he thought of how the policeman was repeating over and over on what he is saying as Fat Gum lectured him and being at it over and over. As the policeman was going to ring the doorbell, Senkai caught a glimpse of what was going to happen.

Senkai: Everyone move now!

He yelled as right on cue, a large figure started to burst out of the door, throwing a punch at the policemen as the heroes got to action, saving the officers in the nick of time. A green blur started to pass by as Midoriya saved an officer that was sent flying.

Voiceover: Clock Up!

Time slowed down as Y/N springs into action, saving the other uniformed officers as he places them down on the ground.

Voiceover: Clock Over!

Y/N: Are you alright?

Officer: Yes, thank you.

He said as the H/C haired teen nodded, hearing a beep on his wrist means that he had used 1 Kamen Rider form.

As this was going on, Ryuku had already transformed into her dragon form as she defends the others from the attack.

Ryuku: Anyway, we shouldn't split up our forces here. Ryuku Agency will take care of him.

She said as she pins down the attacker.

Ryuku: The rest of you go now, while he have the chance!

She said as Fat Gum, directed everyone to charge in as the police force and pros charge inside, only to be met with some attackers.

Y/N: At this rate, they're just sending people out to buy us some time!

He said as the attackers kept on flowing out as they kept attacking the pros and officers that they see. Unfortunately, there are some special guests were present.

Aruto: Trilobite Magia.

Fuwa: Looks like they got plenty of them.

Y/N: He's here.

He said as Y/N looked at the Magias charging at them as the pros tried to attack, but having a hard time in doing so.

Aruto: Y/N go. We'll take it from here. We need to push them back and help the police force and the pros.

Y/N: Are you sure?

Fuwa: Don't worry, he's got back-up.

He said as Y/N only nodded, having some faith in them as Nighteye's and Fat Gum's Squad started to push through.

Kado: Come on let's catch up to them. I'll take care of these guys.

Aruto: I know you will. Now go!

Aruto said as Kado and the others started to attack, pushing the Magias away as they head inside the building.

Aruto: Let's go everyone!

He said as they place their respective drivers as Izu stepped back, holding their Progrisekeys, they started to press them.

Progrisekeys: Everybody Jump!/Rampage Bullet!/Inferno Wing!/Ark Scorpion!

They got into position as they get ready for a fight, unaware that the 4 teens were still heading to the entrance as they look at their mentor and his friends one last time.

Aruto/Fuwa/Jin/Horobi: Henshin!

Voiceover: Metalrise! Secret material Hiden Metal! MetalCluster Hopper! It's high quality./Full Shotrise! Gathering Round! Rampage Gatling! Mammoth! Cheetah! Hornet! Tiger! Polar Bear! Scorpion! Shark! Kong! Falcon! Wolf!/Slashrise! Burning Falcon! The strongest wings bearing the fire of hell./Progrise! Ark! Destruction! Ruin! Despair! Extinction! Ark Scorpion! The conclusion after evil climbs the top of the highest mountain of rock.

Y/N/Jack/Senkai/Kado: Show-offs.

They said as they charge inside the building as the 4 other riders from the outside started to charge head on, helping the pros and the police force.

As the teens head inside, Bubble Girl and Centipeder was apprehending some members of the Shie Hassaikai as there was a secret door had been opened up.

Centipeder: They're already down, you 4 head down there and help them.

Bubble Girl: We'll take care of thing here. Be careful!

They all nodded as they rush down the stairs, what they saw nothing out of the ordinary. A broken wall was there in front of them as they looked at each other.

Senkai: Guess they're progressing much faster than we thought.

Kado: That and Mirio's quirk would be easy enough to follow Chisaki, unless...

Kado said as he just had a small tensed feeling in his gut as he looks at Senkai.

Kado: Senkai, can you use your quirk to look further beyond?

Senkai: I have been training to maintain it a little longer than before. I'll give it a shot.

He said as Kado nodded as Senaki looked at the crushed wall, seeing what could have transpired from Midoriya and Kirishima breaking the wall, Mirio phasing through them as the others were charging through, having to stop as they were fighting members after members of the Hassaikai.

Senkai stopped using his quirk as his vision was starting to get blurry as he holds his head for a bit.

Kado: Senkai, talk to me.

Senkai: I have been training my quirk to see if I can last much longer when I view the future, I also have been practicing to see in the past and present.

Jack: That's cool! But, what happened? What did you saw?

Jack asked as Senkai looked at his friends.

Senkai: They are fighting every member of the Shie Hassaikai. I only caught glimpse of Tamaki-senpai fighting, as for Mirio-senpai, I'm not quite sure. The future is too blurry and I have no idea what's in store for us.

He explained as Kado commended Senkai's efforts as a passage way started to open up.

Y/N: I guess we are about to find out.

He said as the 4 of them started to charge in, as they reached the room, seeing a person standing in front of them was none other than Aku.

Y/N: Looks like the League has been busy.

Aku: What can I say, this is only a temporary partnership, loving the new look and I think you have made a new friend in tow. Wonder how hard will he fall just like your buddies here.

He said as Kado used his quirk as he looked at Aku trying to read his mind, only to see all pent up aggression and evil inside Aku was nothing short of a surprise.

Aku: But, lucky for you, I'll make an exception.

Y/N: What do you mean?

Aku: Let's face it, you're not here to fight me. I get it, you're here for the girl aren't you?

He said as Y/N gritted his teeth as Aku smiled.

Aku: Looks like I was right. Struck a nerve there correct. Now, I'll let you choose, stay here and fight me, or go and chase after Chisaki.

He said as Y/N was now in a predicament, he was willing to sacrifice everything he have to save Eri, but, with Aku in the picture this was going to be a hard decision to make.

A couple of moments later, 3 figures started to walk in front of Y/N.

Jack: Go, we'll give you enough time to chase them.

Y/N: This is dangerous! I'm staying to help you fight!

Senkai: Save your energy, you don't want to be too tired when you save her right?

Y/N: But...

Kado: We'll be fine, now go, she's waiting for her hero to save her.

Y/N gritted his teeth as he shakes his head as he looks at them.

Y/N: Don't die on me you idiots!

He said as he started to charge up ahead, leaving the 3 teens to fight Aku as the exit point started to close.

Aku: Now then.

He said as Jack, Senkai, and Kado got into their fighting positions as Aku grinned meanicingly at them, filled with nothing but bloodlust and violence.

"Let the carnage begin."