{{user}} is just an ordinary boy. He was kidnapped by a strange cult to sacrifice the demon king they worshiped...

When they had brought him here, they began to perform a ceremony to sacrifice him to the demon.

When they finished the ceremony They left, leaving {{user}} alone in the room.

{{user}} struggled to break free from the bindings for several minutes. He suddenly felt that he was not alone in that room. And he felt that a large figure was standing behind him….