As the class was getting ready for their field trip to the USJ, Tenya was busy trying to organize everyone into order for the bus while Izuku, who had decided to not take the mantle of the class president even though everyone was still trying to get him to do it. Once Tenya was able to gain control of everyone however, getting on the bus proved much easier for Izuku as he did not have to think much and sat at the back away from everyone else. What he hadn't planned for, however, was a group of people to follow him to his annoyance.

"Hey, Izuku, what are you doing back here all by your lonesome?" asked Mina as she sat next to Izuku and got in his face, which usually made people move back slightly but to her surprise, Izuku stayed right where he was and just looked into her eyes.

"So I could have some peace and quiet." responded Izuku as he continued to look Mina in the eyes. The message did not seem to get to anyone as they all continued to sit with Izuku all the way to the USJ. While they were heading onwards towards their destination, Izuku started to notice that people were moving ever closer towards the back and he realized it was because of how they all enjoyed each other's company so much. Even Katsuki was enjoying herself to a certain extent. 'Well, at least they're not bothering me as much….'

Once the 1-A bus arrived at the USJ, everyone was shocked in awe as they looked at the massive structure in front of them. Even the doors before them were massive as if made to fit giants. Every student was also shocked to see a person wearing what appeared to be a spacesuit, this had some confused until Izuku broke the silence.

"Wait, you're 13! The rescue hero did not know you were a teacher here!" called out Izuku as he saw the hero approaching the class.

"Indeed that's my hero name. Now, welcome to the USJ or for its full name, the Unforeseen Simulation Joint. It's something I created to help stimulate many different disasters and accidents to help future heroes be able to train for such incidents!" called out 13 as they held out their hands and showed off what they had created.

"Hey 13, thought All Might was supposed to join us here?" inquired Aizawa as he looked around. As he continued to look around, he heard something...

"Ah-Ha, have no fear for I am here!" Answered All Might as he jumped down from the sky. This shocked everyone but 13 as they had known All Might was with them all along.

"Ah, there you are All Might. Now are we ready too…." before Aizawa could finish his statement, he felt a strange presence appear as he looked over towards the courtyard at the centre of the USJ. As he looked over towards where he felt the presence from and saw a strange blackness appearing from nowhere. This confused almost everyone in the class, as they thought this was part of the training as no one at the class had ever had proper combat, except Izuku though memories of Alex, so he knew that something was wrong.

As everyone saw the strange blackness appear, everyone heard what sounded like a low growl from behind them. As they look towards it, they see Izuku with glowing red eyes and see his body beginning to morph. It looked like a steel-like mask appeared around Izuku's mouth as his jacket's hood went over his head while he also got armour around his body. Then, everyone saw his arms began to shift and morph into a whip-like structure as they saw at the physical exam.

"I see you figured it out to Izuku." called out Aizawa as he placed his goggles over his eyes and got ready for combat.

"Figured out what sir?" asked Ochaco as she looked between the pros and Izuku, all getting ready for something.

"Yough Ochaco, those villains aren't meant to be here!" called out All Might as he leapt away to go deal with the villains.

This revolution shocked everyone in the class and had some stunted. How could someone infiltrate U-A and not trip any alarms? This shock was ended quickly by Izuku however.

"Tenya, run to the main building now." order Izuku in a cold and very malice filled voice.

"But…" before Tenya could even finish his argument, Izuku interrupted.

"I would prefer if you went. That way I can assist All Might and keep everyone save." interrupted Izuku as he stared Tenya in the eyes. What he saw scared him, it did not look like the Izuku he had come to see in class. This looked like a beast, ready to hunt down its prey.

"No way problem child, you're staying up here with everyone in the class with 13 while I go assist All Might" rebutted Aizawa as he looked around the assembled group of students. "Yes Tenya, you should go through."

Hearing even his teacher tell Tenya Iida that he should be the one to go get help, both enforced and made him doubt his ability as a hero.

"Sir, you need to stay here and protect the other students, I can look after…." before Izuku was able to rebuttal his teacher's statement. The strange blackness that the villains had been brought though appeared behind them and out of it, came a what appeared to be a man wearing a suit and a strange metal collar around his neck. The blackness appeared to be what made him as he appeared to be fully compromised of it.

"Hello, young heroes and teachers of such. I am sorry to say but…" before the villain was able to finish his speech, Izuku had already sent his tendrils forward to distract and try to bind him.

"Run now Tenya, that's an order from the class president!" called out Izuku as he grabbed at the strange metal collar as he could see a heat source behind it. As he kept the villain occupied, it seemed his message got through to Tenya as he started to sprint for the door.

"Oh no, you…" before the villain could even attempt to stop the speedster, Aizawa had lunged at him and used his capture tape to try and restrain the villain but and enviably fallen into his trap and surrounded the teacher and teleported him to where All Might was currently engaged with many villains, most small-time street thugs. "Now, to separate the rest of you."

As All Might was making his way through the crowd of villains, he noted that there were four of importance. There was the blue-haired man with the hands all across his body, the strange brain exposed bird one, the misty villain whom All Might assumed was their way in and out, but the one that got his attention the most was a red-headed man who kept darting around him trying to cut at him with blades protruding from his arms. This, along with the fact of how many villains there were made it hard to track him. So when he made a successful punch on the villain and downed him, he was glad to see he stayed down….

Or so he thought.

As when All Might turned away to face another villain while stepping over the thought to be unconscious villain, a blade pierced into his upper leg. This along with the other villain who was about to stab his chest with a knife she had pulled out of no-where, was All Might glad to see Aizawa appear and assist by grabbing the villainess with his capture tape and kneeing her in the face.

"Hummmm, super blood like this tastes so good. Let's see if I can't get some more" was the last thing the villainess Aizawa had just neutralized by restraining her when she got swallowed whole by a strange form growing out of the red-headed villain. All Might watched in horror as she was crushed and mutilated and still, the growth continued to grow and as it did. It became spikier as blades and bone producing appeared around its form. He watched as the small built man who had been attacking him before grew to be about his size.

That was when All Might realised he had more than fucked up.