The gymnasium was as big as it could get as Genos's foot made contact with the floor of the gym, the floor consisting of a terrain which looked as if it were rock. Potentially a very good place for intense physical exercise.

Oddly enough, the gym reminded him of the shelter in Z-City, where the loss to the Deep Sea King occurred. It could be the physical appearance, or just a random feeling, but the main point was that it didn't feel good at all. Genos hated losing, Whether it be to Saitama Sensei or to monsters, the feeling sucked. It really did. Yet now he knew that he was many times stronger than before, and therefore the probability of losing and failing a certain goal would be less possible in this world, but conversely it would also mean the feeling of losing, in a hypothetical scenario, would pack more of a punch.

Anyways. Enough of the messy thoughts. There's a class to teach.

As his body approached the students at a steady yet slow pace, Genos's AI couldn't help but pick up on the conversations that the students were having in the gym, due to his passive enhanced hearing. Most of the conversations were out of intrigue considering Genos, mainly his appearance and abilities, yet he didn't really care about the things that the students speculated about him, for he was about to directly show them everything.

"Greetings, students."

In an instant, Genos's eyes picked up the image of an entire class of students turning their heads to face him, their body's response to the voice of Genos calling them. His sensors being able to pick up their chatter, his body's response to that was to continue to approach the students, his usual serious gaze ever-present on his face.

"As you may have heard, this is a new class. A class to prepare you aspiring heroes to be more ready for actual battle scenarios. " Genos's sensors scanned the students one by one as he spoke, his eyes picking up every twitch, every movement that the students were performing at this very second, yet one particular student caught his attention.

He was the very one that decided to save his friend at the great battle that took place when he first came. Yet in contrast to his confidence and decisiveness displayed during that event, he was mumurring. Muttering to himself. Was that an act that he saw back at the battle, well, he was about to find out himself firsthand.

"I believe i haven't introduced myself yet. My name is Genos. And I will be your teacher from now on for this class. Here is your first task."

The students eagerly anticipated the task that their new teacher was about to give them. After all, he seemed like the no nonsense type, based on his pattern of speech and appearance.

"Fight me. All at once."

Sure, the students had practically nothing in common, in terms of appearance, personality and fighting style, yet at this very moment they all had something in common. The emotion of shock and surprise was rampaging through their bodies, like a rabid herd of bisons.

"WHAT?"

"I'm serious. Prepare yourselves. Throw at me everything you've got."

"Sir, may I ask why?" A black haired looking boy had his hand shot up within 10 seconds of Genos making his statement, to which Genos's sensors gave the brain the message that this particular person's face was 100% compatible with student number 13 in class 1-A, whose name was that of Hanta Sero."

"You're Sero, right? Because this is the only way I can effectively assess your true fighting capabilities. This class is all about practical fighting. We'll be doing something similar like this each lesson. This is just the first for many to come. So, make sure you leave a good first impression with your power."

As Genos's sensor picked up from the students, their postures were now not slacking, with his brain deducing that the students were starting to realize how serious he was. This particular one haired boy caught his attention, with his arms shifting into a spiky, armored plating with the edges being sharp and jagged as a result. As for the green haired boy, Genos's sensors caught what seemed to be a green aura surrounding the boy's body, with electricity occasionally sparking out of places surrounding him.

"Well sir, thanks for your kindness. We look forward to your teaching!"

As soon as the students finished speaking, their eyes performed the normal action of blinking, on the orders their brains in order to rest their tired eyes for just a second, yet just with that spilt second, when their eyes exposed themselves again, their new teacher was nowhere to be seen.

A scream from Jiro made its way into their ears as more and more loud bangs followed, with the student's bodies immediately turning to the direction of the sound.

The image of the long range team's bodies lying limp on the floor, with them clutching their stomachs due to their body's reaction to the sensation of pain, their teeth gritting as their bodies were effectively incapacitated, leaving Genos as the only person standing over there.

"Close rangers. Now I come."

As soon as the words left his mouth, his body disappeared from the sight of the Class 1-A heroes, as soon they felt an intense sensation of pain cursing through their body, even quicker than before they could activate their quirks. Yet through all of this, no one could even catch a glimpse of the Demon Cyborg, their bodies feeling the occasional gust of wind as they were soon sent flying backwards, with not even elite students such as Tenya and Kirishima being able to react in time.

As Genos neared the end of his rampage against the students, his eyes sent his brain the image of the green haired boy from earlier, his stance clearly a defensive one. His arms folded out in front of him, forming a shield of some sorts with the aim of withstanding the blow of Genos. Yet Genos's brain did not give his body any sort of special reaction in response to the image that his brain sent him, instead his punch made contact as usual, the force of the punch was enough to force the feet of the green haired boy to leave the ground, his body being propelled throughout the air as his defenses were overpowered, only stopping when his body made heavy contact with the wall, slumping down as a result.

The onlooking Eraserhead and Shoto Todoroki could not help but stare in complete awe and shock. Those were kids that had actual battle experience fighting dangerous villains, for instance the league of villains, and were no joke and not to be scoffed at. Yet the Cyborg here had taken care of them in a matter of seconds.

Just how powerful is he?

"Alright class, on your feet. There is no sympathy on the battlefield. Rule number one of our lessons. That's all for today, now that i know what you all are capable of. You are dismissed."

"Thank you sir…."

As the classes backs turned towards the eyes of Genos as they made their way towards the door, one name sounded throughout the gym the instant it was called out. The green haired boy turned his body around in response to his name being called out, his facial expression that one of surprise and to a certain degree shock, as the cyborg made his way towards the boy.

"You're Midoriya. Izuku Midoriya, right? Follow me. I want to have a word with you."