It was suspected that there was a traitor at UA for a while now. There had not been much evidence, so many could not come up with a conclusive answer. There were clues, however, and they seem to point towards Izuku Midoriya, a boy that seems to have a knack for breaking his bones every time he uses his quirk. Those that suspect him have good reasons. One: his body seems to be not as ready whenever he uses his quirk. Destructive on both the target and himself. Two: it stems from the fact that his quirk had just appeared when it should have appeared when he was 4 or 5 at most. Three: his quirk resembles nothing like his parents' quirks. His father has a fire ability while his mother has light telepathy that she can use to levitate small objects to her.
However, recent scandals had made Izuku a prime suspect and League of Villains put the final nail in the coffin. The staff of UA soon met up and discussed what actions they should take. Many, after seeing the evidence of the Leagues' latest heist, vote to put him in jail with the exception of All Might, Aizawa, and Nezu. All three of them had a talk with Izuku after the training camp incident and had learned how Izuku knew about the incidents a day before it happened. Nezu knows Izuku was not lying to them and they believed in what he had said, which is why they know that the recent incident was not Izuku's fault. Without much evidence and being out voted, there was not much they could have done without too much backlash from the staff, the students and their parents. Later that same week, the Students of Class 1A were informed of this and, as expected, received initial shock before it turned to disgust once they had seen the footage and thought about it through.
Uraraka was the most conflicted out of them all. For one, she is Izuku's first ever friend, knowing him the most out of Class 1A besides Bakugo. She is conflicted on whether to believe the evidence or trust her gut, her gut telling her Izuku is innocent. However, thanks to the pressure that is coming from the rest of class 1A through texts and calls, she leaned more to the evidence. Iida, although wanting to believe Izuku wouldn't do this, ultimately believed the evidence put in front of him. Todoroki, Bakugo, Momo, Tsuyu, Mina and Kirishima did not believe the evidence for no other reason other than that he is just too kind to be that kind of monster.
A week later...
Izuku wakes up to a wonderful morning, sunny day outside and perfect temperature for a jog. He gets up and heads towards the kitchen, going to make breakfast for him and his mom. "Today feels like it is going to be a good day, I am sure of it." You poor naive fool. It has been a month since the training camp incident and he was glad nothing horrible happened. Izuku was at the camp helping out the other students get ready to cook their dinner when he heard a voice in his head. It was telling him that there is a villain attack soon but he knows it is not from One for All. It was something else entirely, like a secondary quirk was talking to him. It only ever spoke to him before the USJ incident and it never spoke again until the training camp incident. Whatever the case may be, the voice told him to warn the teachers and he decided to listen to it, like he did when the USJ incident occurred. What was the harm in alerting the teachers and increasing security a little just in case?
Turns out, the voice was right once again. A day later, the league of villains attacked the camp in the night. Luckily, thanks to Izuku's warning, the teachers and some extra pro heroes were able to stop the attack before it could get out of hand. Although they have no idea who stopped the Nomu that was with them, they were glad that it was stopped. Just wished it wasn't so bloody. Literally, its head was smashed in, like a giant mace smashed it's head. Nobody on the hero's side was captured but the villain's side were not so lucky, making the parents now feel a little more certain about their children's safety being in UA High. The only ones that weren't captured were Shigaraki, Dabi, Toga, Mr. Compress and Spinner. They escaped before the heroes could capture them but not before Toga gets a slice at Izuku. Although this did not bring ease to the parents about the villains wanting to kill their children on the loose, they are at least at ease knowing UA is going to protect them at all cost. It should be noted that Izuku only told All Might, Aizawa and Principle Nezu about the voice in his head, not to anyone else.
He eats breakfast and says goodbye to his mom before leaving for UA. He arrives at UA's main gate and is met with every student of all courses and grades, All Might, Eraserhead, Principle Nezu and the rest of UA Staff all looking at him. The Students look at him in disgust and betrayal except for Ochako, Todoroki, Bakugou, Tsuyu, Momo, Mina and Kirishima, All Might and Eraserhead look at him with a worried expression and Nezu with a neutral expression.
"Um... why is everyo-" said Izuku before being interrupted.
"SHUT IT YOU TRAITOR!" shouted Mineta
"Huh? Wait, what's going on?" asked Izuku, confusion on his face.
"Izuku Midoriya," Izuku turns to look at Nezu, "we have evidence that you are working with the League of Villains and will be sent to prison for the events that occured last week." said Principle Nezu, still with a neutral expression.
"W-w-what? What are you talking about? W-w-what incident?" asked Izuku, becoming even more confused
Turning to Aizawa, or Eraserhead, Nezu nods at him and he complies, bringing out a tablet. It shows Izuku in what looks like a really nice business suit breaking into Nezu's main office, grabbing the files that held information on all heroes and students and all too familiar purple portal swirled and warping Izuku away before closing.
"W-w-w-w-wait… that is not me, I sw-" said Izuku before being cut off by Nezu, who spoke some more.
"We had suspected that there was a traitor among us for quite a while. Thanks to this and to the past two incidents involving the league, the staff casted a vote to put you in prison. Officers." said Nezu as the police entered and put handcuffs on Izuku.
"Izuku Midoriya, you are under arrest and will be sent to Tartarus prison for the stolen information and endangering all of the students and pro heroes." said the police officer
"W-wait, why Tartarus?" Izuku questioned.
"That would be thanks to your quirk. You are too dangerous to be kept in a normal prison and as such, will be sent to Tartarus for 5 years. Maybe less if you have good behavior." said the police officer.
Throughout this whole exchange, Bakugo stood silent. He knows something is off, why would Deku ever steal? Another side of him wants to believe the evidence and call him out for being a traitor but his more rational side is saying that Deku did not do it. He would never because it was his dream since childhood to be a hero. He knows Deku would never steal and help the villains but he has no evidence to help him out.
Meanwhile, All Might and Aizawa look on in silence. They want to help Izuku out and know Izuku would never steal but they cannot help either. They also had no evidence that would help Izuku right now.
Izuku gets dragged closer to the police car without resistance because resisting now would make him look even worse. He looks towards Uraraka and Iida for help.
"P-p-please, you all got to believe me, right Iida-kun, Uraraka-san?" asked Izuku, hoping they would believe him.
"I'm sorry. I-I-I want to, but I don't know anymore..." said Uraraka.
"I thought you would be the greatest hero, but it turns out I was wrong about you." said Iida
Hearing his friends say this nearly broke him as he looks at All Might, hoping that he will help him. All Might approaches Midoriya and whispers to his ear.
"Play along, ok? I am gonna take back One For All but once we find evidence, we will set you free." said All Might, giving Midoriya hope again but did not show it. All Might, with Izuku's consent, took a string of hair from him without anyone noticing, ate it and went back to the rest of the group.
As Izuku is taken to Tartarus, Uraraka looks on with tears forming in her eyes. She is conflicted whether or not to believe in the evidence more or believe that Midoriya is innocent but after saying that to him, she immediately regretted it when she saw his face. Pain was all over Izuku's face and it was at that moment that she finally believed that Izuku was innocent but it was too late to say it to him. She tears up and runs away, crying to herself till she is too tired to do so, guilt washing over her for what she had done.