It doesn't seem so, but it's implied he could have stopped a suicide, making society view him as a murderer. Apparently a gangrape happened and he walked in on it, just stood by and watched it happen while smiling (this is enforced when the main villain girl tried to re-enact the event, even though she failed, and seems to be experiencing the same issues the MC went through). The full details as to why this event happened are not known yet. All that's known is that the girl was bullied bad and committed suicide after. Because some students knew he was there and didn't do anything, they blamed him for her death. Clearly something beyond all that happened to completely destroy him, mentally, and operates though life at ultimate bare minimum job requirements.