(At U.A. High, everyone is seen mind their business until four figures come in, and it draws Tenya Iida's attention.)

Iida: (stern) Hey! You're not authorized to enter this school without a proper uniform!

(Cut to Leonard, he is seen having a talk with Class 1-B.)

Monoma: You're really cool. Who knew you could defeat the Number One Villain.

Leonard: Yeah, the fight was hard, but I managed to defeat him.

(Suddenly Izuku comes in.)

Monoma: What do you want, man? Can't you see that we're busy?

Izuku: There are four girls who entered the school, and Ingenium is having an argument with them.

Leonard: Can you describe them, Midoriya?

Izuku: Yes, one of them has a blonde hair and lilac eyes, besides wearing a brown jacket with a yellow shirt. There is another one with black hair, wearing a bow and has amber eyes. 

Leonard: I know who it is.

Monoma: You do?

Leonard: Follow me.

(Then Izuku and Class 1-B go to there the argue is still happening.)

Yang: Are you gonna let us in or not?

Iida: (glares) Does it look like I'm gonna allow some people with rude behavior to get in this school? (scoffs) Not a chance! NOW LEAVE OR I'LL HAVE TO USE LETHAL FORCE!

(Yang tries to punch Iida, but Izuku blocks her punch.)

Iida: I had her, Mr. Midoriya.

Leonard: So? Mind telling me how you four got here?

Iida: Hmm, I'd ask the same thing. (to Team RWBY) Are you new members of the League of Villains?

RWBY: League of Villains?

Izuku: It's a group composed by villains who seek to destroy the heroes.

Awase: Who are they, Leonard?

Leonard: Class 1-B, meet my ex-girlfriends.

Monoma: Oh, so it's them...

Ruby: Leonard, please come back to us.

Leonard: Why should I? You never cared about me, especially Weiss, who just used me to get rid of my brother.

Weiss: Please, Leonard. I regret what I did. So come back to us.

Leonard: No can do, Weiss. But my new classmates would like a word with you though.

(Class 1-B approaches Team RWBY.)

Awase: So you're the ones who broke our classmate's heart, huh?

Weiss: And who are you?

Monoma: We are Class 1-B. I am their captain Neito Monoma.

Tetsutetsu: I am Tetsutetsu, brother of Eijiro Kirishima.

Iida: I am Tenya Iida, the current Ingenium.

Izuku: I am Izuku Midoriya, disciple of All Might.

Ochako: I'm Ochako Uraraka, also known as Uravity.

Shoto: I am Shoto Todoroki, son of the Number Two Hero.

Momo: And I am Momo Yaoyorozu, president of Class 1-A.

Ruby: Please, what can we do to get you back?

Leonard: You can't, but you can go back to Beacon.

Yang: Screw you, we're not leaving.

(Suddenly Iida dashes and Yang and kicks her in the gut.)

Iida: I warned you!

(Blake tries to attack Iida, but Jaune blocks her with his sword.)

Leonard: Nice reflexes, brother. I can see that you improved considerably.

Jaune: Being a Kamen Rider has its advantages.

Weiss: How is that dolt using a sword?

Leonard: Don't worry about it. Worry about yourself!

(Timeskip)

(Everyone is seen in the arena as Leonard prepares to transform.)

Leonard: Hen...shin!

(Leonard transforms into Kamen Rider Black.)

Black: Kamen Rider! Black!

RWBY: How?

Black: It's classified, and you lost the chance to go back home uninjured. But I'll let some of my classmates take you on. Itsuka, you're going to take on Yang as you're the brawler of the class. Inazuma, you'll be facing Blake and show her the true power of a dragon. Monoma, you got Ruby. Be careful, she is fast. I'll get Weiss.

(The three nod as Inazuma prepares to transform as well.)

WAKE UP!

CROSS-Z DRAGON!

(Inazuma spins the lever of his driver.)

ARE YOU READY?

Inazuma: HENSHIN!

WAKE UP BURNING! GET CROSS-Z DRAGON! YEAH!

(Inazuma becomes Cross-Z, and both Kamen Riders get in their fighting stances.)

Black: I hope you're ready, Weiss. I won't hold back.

Mic: All those not involved in the fight, please go up to the stands.

(The rest nods and leaves the arena.)

Mic: Very well, the match is Neito Monoma, Leonard Arc, Inazuma Aizawa and Itsuka Kendo vs Ruby Rose, Weiss Schnee, Blake Belladonna and Yang Xiao Long.

(All fighters get in the fighting stances.)

Mic: BEGIN!

(Monoma uses his Quirk and copies Ruby's Petal Burst. Meanwhile Leonard is seen ready to fight Weiss.)

Weiss: Give up, Leonard. You will not win.

(Weiss fires a flurry of icicles at Black.)

Black: You can't just relay on your glyphs to win every match, Weiss.

(Black dodges the icicles, charges at Weiss and manages to land a few punches on her.)

Weiss: Ugh, how are you so strong?

Black: I was about to die, when I suddenly got a call, a call I knew I couldn't refuse. You've got no chance of winning.

Weiss: We will find a way!

(She summons her Arma Gigas.)

Black: Bringing out big guns, huh? BATTLE HOPPER!

(Battle Hopper comes out of nowhere and hits Arma Gigas, bringing it down easily. Then Black jumps off.)

Black: RIDER PUNCH!

(Black hits Arma Gigas with a punch, and then he jumps off again.)

Black: RIDER KICK!

(Black kicks Arma Gigas in the chest, destroying it.)

Weiss: (shocked) No...

Black: You brought this on yourselves when Yang tried to punch me.

(Then Black punches Weiss, knocking her out, and turns to see Ruby, Blake and Yang defeated as well.)

Black: Good job, guys.

Mic: And the victory goes to Leonard Arc, Neito Monoma, Inazuma Aizawa and Itsuka Kendo!

(The other students start cheering the four up as Black and Cross-Z revert back to normal.)

(Timeskip)

(Leonard is seen with Nezu, All Might, Eraserhead, Midnight and Ms. Joke at Ozpin's office of Beacon Academy.)

Ozpin: Hello, Leonard. What brings you and All Might here.

Leonard: We're here to bring your students back, professor. And also, can I have a talk with the general?

Ironwood: What can I do for you?

Leonard: First, let me introduce you to the headmaster of U.A. High, Nezu. As for what we want to talk about...

Nezu: We would like these girls to be put in some kind of security watch.

Ironwood: Why a security watch?

(All Might proceeds to tell them what happened back at U.A. High.)

Ironwood: Very well, I'll see what I can do.

Leonard: Thanks, General.

(Eraserhead sees a crow and uses his Quirk on him, forcing the crow to reveal himself as Qrow Branwen.)

Qrow: What? How is that possible.

Eraserhead: (smirks) My quirk can cancel the others' powers when I simply look at them.

(Then Midnight pulls out two cards.)

Midnight: These are for you and your teammates, telling what your nieces did, and they reason why they got beaten up.

(All Might hands a letter to Ironwood.)

All Might: Give this to the Schnee Family. It's the same thing Midnigave Qrow, but about Weiss.

(Ms. Joke hands a letter to Ozpin)

Ms. Joke: If you could deliver this to the kitty's parents, we'd gladly appreciate it.

Ozpin: Very well.

(Then Leonard and the four Pro Heroes leave Beacon as the screen fades out)