Mind game where you don't know if it's real or not
To overcome some expirement and become no longer normal human but still want to live i think is admirable
I added this to list becouse MC at the beggining wanted to die and his life was miserable
One of my most favorite mangas. Personally i like it becouse mc (Hajime) becomes so powerfull becouse he is left by his classmates to die in caves there is just monsters. But he overcomes everything, changes completely (in outside and even inside) becomes not nerd as he was but cool guy
The Grim Reaper - Soul Savior