In a regular for the Class 1-A, students were doing regular class basis. Izuku Midoriya noticed something from the corner of his eye, a pencil eraser suddenly fell down at a slower rate, as he reaches it out to grab it, nothing happened. When he placed it down, it does exactly what he first saw it.

He raised his hand as the homeroom teacher, Aizawa took noticed of Midoriya and asked him.

"Yes? What is it, Midoriya?" He saw the resident problem child pointed his index finger on the eraser still dropping as it wasn't even moving. His eyes turned red as his hair raised upward, the entire class took noticed as he activated his quirk, looking at Uraraka. She was sweating profusely as she did something wrong. He turned his quirk off as he noticed that the eraser still floating in the open space. "Okay, Uraraka, did you do that?"

"Did what exactly, Mr. Aizawa?" Uraraka replied confusion was written on her face as she began to see what he meant by that. She looked at his stare to the eraser, her eyes widen as she shook her head rapidly "I didn't do that, does everyone owned that eraser?!" She questioned everyone, as they're looking at the center of attention. The floating eraser.

"Who owned that eraser? Raise your hands, everyone!" Iida ordered the class to answer his question, all he received is a confused muttering as none of them owned the eraser.

Suddenly, deep laughter echoed through the classroom. "It looks like they took the surreality of the situation so well!~" A mysterious voice congratulates them for their level-headedness, some students are confused and asking questions in a frantic manner.

"Are you a villain?!"

"What's going on here?!"

"A villain manages to enter the school undetected?!"

The figure smirked as a single loud snap of its fingers, the entire classroom slowly unraveled itself in a cube box, the ceiling popped open as it folded itself, revealing a man in a red shirt and a black suit, covering his entire body in cloth. His head was entirely covered in a black mask cloth with two glowing eyes that stood out of his mask.

"Now I've gotten you to attent-" The man was cut off with an explosion rung behind the classroom. Bakugo propelled himself towards the figure before them, as the man raised his hand up, but not towards the explosive boy but to the teacher, preventing him from using his quirk nor his capture weapon. Letting the hothead attack the figure.

"Howitzer" Bakugo unleashed his ace in a hole "IMPACT!" A huge explosion engulfed the figure, however, the blast did nothing as the explosion suddenly sucked in by the man's hand, crumble it and reveal a small orange ball, glowing brightly as it was pulsing with explosive energy. He was holding Bakugo with his other hand, as Bakugo himself has tried to let go, but it wouldn't budge, the man has a trip grip.

"Ah!~" He looked at Bakugo's shocked expression as he glances over the rest of the students. "A volunteer~ Howitzer Surprise!"

He hurdles the minuscule ball of an explosion at the students as Todoroki, acting quickly, he conjured a wall of frozen ice, shielding them as they brace for impact. Shards of ice flew past them as the coast is clear, however, before the class gets the chance to retaliate. The man threw Bakugo like a ragdoll at Todoroki, the entire class were suddenly immobilized by an unknown force. "That was fun, although we're on a tight schedule here since the others are waiting for you~"

'Others?!' They all thought before he snapped his fingers and suddenly the area dissolved itself into a theatre, several familiar voices can be heard through the room.

"Ha! I win, pay up. All might!

"I thought they'll win but he immediately finished the fight."

"Now, gentlemen. Refrain yourself from betting on how the outcome would go, it's rude to bet on your students."

The class widen their eyes, surprised that the rest of the teachers and even the principal was there as well. Relaxing as if they've been here before. The figure materializes himself out of digital pixels. "And I know what you're all be thinking right about now: who are you and what's the meaning of this?" He called their attention.

"That latter would be Shouta's" Present Mic commented as the man in question shot a cold stare at his colleague. "Yo! Eldr, Can I take it from here?"

"Certainly, however and sorry Mic. I would hand this one to All Might" He waved the No. 1 Hero to bring up his introduction.

"Class, " All Might gesture towards the mysterious figure "He may appear to be threatening, but he's quite a good fellow. His name is Eldrozul, he would like to show all of your alternative realities of ourselves."

The class was astonished by the announcement, and they should be. They get to see a series of worlds differ from their world and they're amazed at that point. Eldrozul open his hand and suddenly the class can move and immediately, someone threw a pink ball at Bakugo, upon impact, it dispenses into a pink cloud, knocking him out in the process.

"Thanks, Midnight. Although I have laid down the foundation of the worlds:

1. The reality of different worlds may have similar events happen from your alpha. Which means if any of them is a similar scene, implies that it already has been done in your world.

2. It doesn't change anything, once it's done; it's history no exception, it's only written by the winners anyways.

3. You'll be seeing sides of people that are close to you and will be exposed, for your safety, it's better to explain it now rather than avoiding it altogether.

4. And finally, it's not for my entertainment, it's meant to help you understand the concepts of reality and what our understandings are. To what it meant for you to play them out as you observe. And what you should be grateful for what you've encountered rather than hoping for an alternative"

The class leans on, paying attention to the rules. Some are surprised by the #1 rule, their world are experienced something that already happens? That info shook them to the core, especially Midoriya. The green hair boy sigh in relief on #2 rule, however, quickly turned pale as a ghost when #3 rule was announced, he had no other choice but to spill them about his quirkless background and All for One. He looked at All Might, unnerved how he's taking all of it too well.

The #4 rule made them ponder over that for a bit. These alternative realities suggest that there are certain historical events that they wouldn't want the others to see especially they're remained hidden for an important good reason.

Eldrozul lowers his visibility by 50% as he stands in front of the theatre room. The pointed to the Hero Course Students. "So any questions?"

Iida was the first to respond "Are for certain that we'll learn from this?" He waved his hands around in a rapid chopping motion.

"Of course, it depends on certain realities for which you'll be witnessing on," Eldr replied, looking at the Class Rep in amusement. He looked at Yaoyorozu's hand raised and accept it through open palm which glows green.

"What you mean by rule #4" She questioned, perplexed by the meaning behind it

.

"Not a rule per se, more of an advice, it's better for you to accept what you have rather than what you think you deserve."

The class ponders over the advice eldrozul gave them, sure they like to change certain things in their past they rather forget but they don't know for certain.

The theater screen flicker as it shines brightly, something has shimmering from Eldr's hand, a dark emerald spherical shape with a dark eye design at the center. He showed it to the audience and the observers as it hovers upon them. "So, shall we start the presentation!?" Eldrozul declared as the class looked on the screen.