Deku had put his middle finger up as he revealed he was the U.A. traitor. He had brought the League Of Villains to U.A., killing at least ten students and had majorly injured more than half of the students and two teachers alike, having no mercy at all. No mercy, even for the students that used to be friends with him; and there were many: Ochako, Iida, hell, even Todoroki. In fact, all three were majorly injured. And what's worse.. they were all majorly injured by Deku himself.

Now that whole thing is done, All Might has never felt worse than ever, ever before. He's in his successor's dorm room sitting on Deku's bed, All Might posters all around him and just-just All Might stuff in general all around him. (Nothing that would seem like it was from a traitor, by any means.) And just.. thinking, in a way. Thinking about how wrong he was to pass over One for All to Deku. How stupid was he, really? (But, a tiny voice in his head said to him, that passing it over to Deku was a good thing. All Might will never understand why he thought that.)

Deku had been the one wanting to be a hero, the hero. Wanting to be one so desperately, he had practically begged All Might if he could be a hero. And All Might had seen himself in Deku, had seen his past self in him, when he was quirkless but wanted to be a hero nonetheless. (Just like Deku did.) All Might had seen that, and knew right there and then that Deku must be his successor, that he will defeat whatever evil there was in the world.

Maybe that's the funny part. Deku, the one chosen to defeat some great evil, but becoming one himself instead. Supposed to help others in need, when villains are here, but instead hurting them more. Who's supposed to step up and defeat him now, if All Might's quirk is now his? If one of their most powerful weapon is Deku's, the great villain they're trying to defeat? Will the hero's even win this time? Will the darkness truly take over this time?

"Toshinori. You shouldn't think too hard." An old voice spoke behind him, or, Gran Torino's voice spoke behind him. The voice cut him out of his thoughts, "I know." He replied as the older came and sat next to him on the bed. "I know you must feel bad, but we can defeat him and force him to pass over One for All." All Might sighed, though that was one of his concerns(what Deku would do with One for All), but it was also his friendship with Deku. He spent most of his time with Deku for such a long time, he felt as though the boy was his own son. Gran Torino must've already known, as he added with, "And, don't worry, the boy won't be harmed while in any of this." "Thank you, Sensei." Gran Torino smiled as he started to walk towards the door, not saying anything else as the door quietly closed.

All Might has never felt so guilty before. But, he's also never felt the pain and sadness that's overflowing right now because of Deku's betrayal. His son's betrayal. And a betrayal to all that All Might thought Deku believed in. A betrayal to All Might, actually.

Guilt, pain and sadness. That's a horrible mix but it's what he has.

...

Deku knows he's stupid. Stupid for playing this game with the villains. For following along. He knows that he's doing is wrong, he isn't that stupid, at least. It's just.. the League of Villains, he truly hates them. They had brought him into their stupid game and now he can't press the exit button.

He knows he shouldn't have listened when they threatened the life of All Might and his mother. He shouldn't have listened to them, then he wouldn't be in the place he is right now, sitting on the floor of the League's hideout, alone with his thoughts. They had told him that if he didn't help them, he's mother's head would be gone in a day. Then, he helped them with the Summer Camp and USJ, but apparently, that wasn't enough. After All Might's and All for One's battle, they had threatened All Might's life if he didn't help them attack U.A. when they wanted to.

Or, in other words, when they wanted to reveal that U.A.'s traitor was none other than the person they trusted the most. They wanted to play a sick game on the people he loved and loved him back, and he had no choice but to agree. (A voice said to him that he could've disagreed, but Deku believes otherwise.) It was sickening, having to laugh and play and talk with his friends, while knowing in the back of his head that one day he will backstab them, maybe even in both ways. When Todoroki talked about his past with him, how his father abused him, and when Deku had comforted him Todoroki replied with, "I'm so glad I have a friend like you, Deku." Maybe he's not so glad now. When Iida had explained how his brother got attacked by Stain: Hero Killer, and what happened to his brother afterward and how he's going to carry on Ingenium. When Ochako had simply just talked to him, on the phone, wherever, and Deku got all blush-y. And when Deku had almost, almost, send her a love letter before realising he would have to betray her one day.

A memory flashed before Deku, a memory that changed his entire life, even before the League. When All Might had given One for All to him, when 'quirkless' wasn't a title Deku went by anymore. One of the happiest days of his life, well.. it was the happiest day before the League had threatened his mother. And then the next few happiest days. He and All Might grew insanely close in training, and ever more close when just talking to each other casually. It was like.. like All Might was supposed to be his father, the one that left him before he even knew it.

That's all in the past now, that's all gone with the wind. 'The Good Old Days' as Deku likes to call them. (All capital letters are indeed necessary.) He probably can't go back now. Probably can't live the life he's always wanted with Ochako. Probably can't ever talk like friends with Todoroki again, probably can't race and have a good time with Iida anymore. Probably can't be the ninth holder of One for All any longer, probably can't be a hero people can depend on anymore, probably can't go to U.A. anymore. Probably won't be seen as anything but a villain to anyone and everyone. But.. there is always that one 'probably' in all those sentences. (Maybe Deku can let himself hope, even if it's just false.(and he knows it is.))

Deku feels guilt. For all he's done to his (quote and quote) "friends" (are they even now?), for all his done to everyone he made suffer. He feels pain, how could he have done that to them? But, Izuku Midoriya feels sadness of all things. He can't go back now, and probably never will.

Guilt, pain and sadness. What a lovely mix, isn't it?