UA High – Classroom 1-A. The room feels like it’s about to burst apart with the sheer number of powerful figures crammed inside. The desks creak under the weight of pirates, demons, and Hunters. The Pro Heroes—Aizawa, Present Mic, Midnight, and All Might—stand at the front, trying to keep some order.
Aizawa, half-asleep in his sleeping bag, glares at the horde:
“Principal Nezu… what the hell have you done?”
Nezu’s voice from the intercom:
“A little… crossover exchange program, Aizawa. Let’s see how our beloved students handle it.”
First Chaos Explosion:
Killua and Gon immediately race each other to grab the front desks, ignoring Aizawa’s death stare. Leorio yells about fairness, already arguing with Present Mic about "how classrooms should be structured."
Hisoka leans against the wall, eyeing the heroes and students with that unsettling grin. He murmurs about “interesting toys” which makes Denki and Mineta shiver.
Illumi sits perfectly still, his black eyes scanning everyone coldly like he’s deciding who he could control.
One Piece Crew Dynamics:
Luffy barges in, instantly befriending Deku with “WOAH, you have stretchy powers too?!” before tugging on his arms. Deku is screaming flustered analysis while Luffy laughs.
Zoro immediately falls asleep in the back, while Sanji is too busy trying to flirt with Yaoyorozu and Mina until Nami smacks him.
Doflamingo, towering in his pink feathers, lounges with a twisted grin, whispering about how easily he could puppet this entire class. Aizawa’s scarf twitches threateningly in response.
Mihawk sits silently, hawk eyes darting across everyone. Bakugo tries to bark at him, but one glare from Mihawk shuts him up cold.
Law sits near Todoroki, oddly quiet, flipping his scalpel lazily. The aura between the two is icy calm but terrifying.
Caesar Clown and Monet hover near the windows. Caesar is ranting about being the genius scientist above everyone here, while Monet just smirks with quiet menace.
Moria laughs obnoxiously, his old crew lurking behind him, until All Might steps forward, his smile tight but unshaken.
Demon Slayer Group:
Rengoku bursts in with his booming laugh: “AN EXCHANGE PROGRAM?! FLAMES OF YOUTH BURN BRIGHTLY, YES!” He’s instantly best friends with Kirishima.
Tengen Uzui crashes into the room with glitter and all three of his wives, dramatically declaring Class 1-A “UNFLASHY but workable.” Kaminari and Mineta’s eyes nearly pop out of their heads.
Obanai and Muichiro sit quietly, unimpressed by the chaos, while Akaza cracks his knuckles, eyeing strong opponents like All Might and Endeavor.
Doma beams too brightly, trying to offer candy to the 1-A students, while Shinso mutters “creep.”
Gyutaro lurks near the shadows, glaring at everyone suspiciously.
And of course, Muzan strolls in at the very end, pristine and commanding. The room chills. Even the Pro Heroes stiffen under his presence.
That’s when you step in—an Upper Moon demon, personally favored by Muzan. He introduces you almost like his right hand:
“This one… is my most loyal. Remember their face.”
The Pro Heroes all go on edge. The students whisper. Bakugo growls.
AOT & Spy x Family Entrance:
Levi hops onto a desk, unimpressed by literally everyone. “Tch. A bunch of brats and clowns.” He glares especially at Doflamingo, who just laughs.
Damian, Anya, Becky try to squeeze into the kid’s desks, Anya already accidentally reading minds and freaking out because everyone here is insane.
Loid tries to calm her, acting composed while sweating bullets inside. Yor quietly mutters about “so many dangerous people” but clenches her fists, ready to protect her family.
Demetrius Desmond is oddly calm, already analyzing who’s the biggest threat.
Pro Heroes Trying to Contain It:
All Might (still smiling, but visibly stressed):
And in the middle of it all… you, Muzan’s favored demon, slide into the scene—quiet, loyal, but with everyone’s eyes subtly drifting toward you. The students don’t know whether to be afraid… or curious.