Shamelezzz
There are a lot of problems with what you are trying to acomplish. 1. Shigaraki at that time would just kill him. (game over) 2. Kurogiri isnt an idiot. He can take him as hostage and force All might out or just give Deku to All for one so he can analize and make sure that he fullfill his words. (game over) 3. Deku doesnt have any reason to seek for the villains when he is as weak as Sakura at the beginning of the serie. (death wish) 4. Your Deku it's different than the original, but he still doesnt have the guts to pull that. The only and forced way you can try it to work out it's that he is extremely "lucky" so a lot of bizarres thing can happen. But I recommend you just erase that part.
I don't understand where this stupid idea came from, but he knows he's in a place full of bad guys and bug alone and they're going to kill him. He still believes that the world is a fantasy, and that if he dies there there is no other life. I say you better think of this stupid chapter, if you want to change or erase it, or think that "all for one" does not have the elusiveness of mind reading or hypnosis to discover the truth.
author i suggest you to delete this chapter or change the villain part, this was just pointless, what if there is some person infiltrated in UA if they did it once they can do it again there is not worth his second life just taking that high risk i mean he is basically death, just forget about that plan, maybe mc can make himiko to spy them and secretly tell him information after he sate her, he can give her a book from the system were she can tell izuku everything she knows. Basically both of them have one book, whatever izuku write in his book will be seen in himiko's book and viceversa like that it wont be suspicius she is just writing after all, that is more viable and safe than this. Dont quit this novel just dont rush things and think carefully what youre trying to do and if that looks realistic, you just need to delete that villain part and replace it with other things, focus on mcs strength and girls