A story about saving the world from demon king or so it was like that but....no Kin sagashi our character who was a transport to another world with its classmates didn't have a clue what was in store from him he did not join the hero and neither kill the demon king he wanted the thing... The thing that he lost during transportation to another world was sleep!? That what he is trying to find
WHero:how dare trap us here u monster (demon king )
Demon king:huh ...what nonsense are you spouting. You are the one who trapped us here
???:silence pathetic fool's
Hero:huh....(looks at throne)kin?
Demon king:....uh ahhhh
Kin:You are in danger