"I came from a world so dark" bro you were a highschooler in Japan, wtf are you edgy about? Also what happened to the "my body is destroying itself"? Every few chapters the author uses it as a way to put stakes on the battles but then forgets it
You could argue that being "bottom tier" in Highschool, especiallly the asian versions, is ...pretty dark..
To the point of driving kids to suicide Dark...