Ch. 10 spoiler boi
Treynar would take the blame and expose his existence just so Eirth could have a chance to go back. Goddamn... There was no way that could happen but its still heartfelt that he suggested that. I hate almost everyone around him. Shit parents, shit friends (well the chick and sword dude cus idk if Fuu did anything), shit community. Up until meeting Trey, he only had a maid he liked and now he scares her. He fucked if he tried to go back now that this happened. I enjoyed the punches to his dad, both physically and mentally.
So it's like 3 options to which 2 would be in universe. Either a new girl or a god and the third option is a 4th wall break but usually it's not this emphasized to give these breaks a face. Like nozawa or the random guy who is pessimistic on the anime.