Chapter I
An Unaware Exchange

Running into the UA dorm, Izuku grabbed up his books, stuffing them into his bag and leaving, slamming the door shut behind him.

He was exhausted, working so often on his internship under Nighteye with Mirio. The verdette wondered how the bright boy had endured it, managing to remain cheerful despite clearly being overworked.

Nighteye hadn't been joking when he said that he'd probably keep missing school.

It was to be expected, he noted, after all, the stoic man had been the sidekick of All Might, back in the day before their separation. It made sense that All Might of all people would be the one to constantly endure him.

At least, while their partnership had lasted.

He was on his way to school, dashing from the Heights Alliance dorm in order to catch the first class of the day; English. He was lucky to have finished the assignment once Iida had managed to send him a picture of it from his phone. It took ages to complete it all while Nighteye wasn't looking.

He wasn't even sure if the man didn't already know what he was doing with his foresight, providing he might have used it on him.

Now he'd just have to get there on time, he observed, glancing at his watch as he hurried down the path towards the building.

Two minutes left! Midoriya panicked internally, passing a few late students along the way.

Now how am I going to get there in time?

He muttered aloud at a sprint.

"...Well, I could always use Full Cowl providing that I don't overdo it, seeing as Present Mic is hardly ever early for English, meaning, I might run into Mr. Aizawa, if he is actually talking to the class before school starts. Taking into account the amount of students around me, I'd probably arrive at two- no, maybe three minute-" he mumbled incoherently.

Literally everybody in the hall stared at him.

"-Shut up already, Midoriya!" a random student yelled in irritation as he jogged by.

"Ah- Sorry!" the green haired boy apologized, hopping out of his way sheepishly.

The students laughed, moving on their way.

Come to think of it, how did he...? he noticed, looking at his watch again.

"One minute!" he freaked out, "I'm gonna be late!"

The poor boy dashed down the hall quickly, not even bothering to use his quirk as he ran.

Finally, his class door was in his sights as the bell rang, signalling he had failed his internal mission.

Stopping before the huge entrance, Izuku gulped, preparing himself for the berating to come.

Nervously, he swung the door open, quickly checking to see if any teacher was already inside. Sighing in relief, he made his way across the classroom to his seat...

Only to not find it.

"H... Huh?!" Izuku exclaimed in shock, noticing the utter lack of free seats in the vicinity.

A familiar voice rang out nearby.

"Oi, you fucking glacier, the damn nerd's here today. Get the fuck from behind me," Bakugou demanded in a rage, slamming his hand onto Midoriya's usual desk with a vengeance.

The kid seemed to need a moment to process that insult.

"... Glacier?" Mystery Boy repeated in disbelief, barely moving an inch from the chair in response.

"Didn't you hear me, ya bastard? Get the fuck out!" Katsuki popped a blood vessel, nailing his foot down on the desk and exploding his hands threateningly.

Midoriya was surprised that his long time bully would actually 'defend' him like that. Never would he have expected that in a million years.

But who is this? He questioned himself internally, staring confusedly at the blue haired boy seated in the school's uniform before him.

Uraraka made her way over to stop the fight from happening.

"Calm down, Bakugou! Seishun doesn't want to fight you!" she pointed out, pouting slightly.

"Don't tell me what the fuck I should do, bitch!" he glared threateningly at the brunette next to him.

She backed up slightly in shock, her eye barely twitching.

"What's it gonna be, huh asshole?" Katsuki demanded irritably, "You gonna leave or am I gonna have to kill you?!"

The boy stood up, raising his hands in surrender as he moved from the chair.

"I was always going to leave, you know," he paused, picking up his shoulder bag warily.

The blonde glared harder.

"... Don't have to be a bitch about it," he stated, smirking as he bypassed him.

Shocked reactions were all around the room as Bakugou's classmates snickered at the insult, further sending him into a burning fury.

His eyes glowed red as a dark aura burst around him, showing his rage.

"What the fuck did you just say to me, nerd?" he demanded furiously, getting off the chair with an irked expression.

His hands kept combusting with explosions.

"That's enough, Bakugou. You too, Morishita," a drowsy voice ordered from behind Midoriya, making him squeak in fear.

Katsuki didn't seem to notice where it came from.

"Shut the fuck up, Deku, I'm having a conversation," he snapped angrily, turning back to the now distanced bluenette.

"Now, where were we?" he sneered, making his way over to the relaxed child.

His explosions disappeared.

"Huh?! What gives?!" he stared at them in shock, dread making its way on his face.

Glowing red eyes stepped from behind the now white Izuku, black hair raised upwards in the air.

Before the class, was Eraser Head himself, his quirk activated as he stared at Bakugou coldly, cancelling his power.

The blue haired boy whistled in awe.

"Your little conversation can be done at another time," Shota Aizawa stated coldly, his hair falling back down in his face.

"Tch," Bakugou clicked his teeth in annoyance as he evaded his gaze.

The black haired man turned to the unknown student.

"I didn't expect that from you of all people, Morishita," he noted.

"Sorry sir," Morishita apologized, deflating slightly.

"Don't make it happen again. I'm sure you know your situation. Act like it."

"Yes sir..." he nodded, glaring at the floor angrily.

"Now then. Midoriya."

Said boy shot up.

"Y- yes!"

"I understand you just got back from your internship. But why are you standing?" he narrowed his eyes in suspicion.

"Well- I... um!" the green haired male panicked, pushing his fingers together nervously.

"You were late. Weren't you?"

The class watched the exchange in silence, awaiting his response.

"Um-!" Midoriya started to formulate an excuse.

"-I was in his seat, Sir," Morishita spoke up generously, taking the blame.

"You were, huh?" Eraser Head scrutinized him, scowling slightly.

"You better not be lying to me, Morishita."

"I swe- I'm not lying to you," he hesitated.

"... I'll believe that. For now," he sighed reluctantly, "You'll be leaving now, right?"

"Yes, Sir," he nodded in affirmation.

"Let Iida send you the homework. You're in my class now, so I better not see you slacking off. Alright?"

"Yes, Sir!"

The man nodded, "Now go."

Walking out of the room, the boy glanced at Midoriya, startling him as he approached silently.

A hand rested on his shoulder.

"You're welcome," the male stated, before removing his hand and exiting the classroom.

"Ah, um, thank you!" Izuku fumbled in surprise, taken aback.

Turning back around, he made his way to his seat, Bakugou scoffing in front of him as Eraser Head left, letting Present Mic enter the classroom.

Hearing the chalk scratch on the board, he glanced at his notebook in silence, muttering slight things as the teacher stared at him in mild surprise.

A single question ran through his mind.

Who was that guy?

***

Deku's been replaced!

When a new exchange student temporarily takes his place, what does it mean for the future of class 1-A?

Q: What is your favorite character?

Remember to vote, comment and tell me what you think! Much appreciated!

PS: This chapter was so bad. 😂