A group of bored delinquents are transported to a parallel dimension as part of a survival game.

After finding his mom killed, Satoru's time-traveling ability takes him back 18 years for a chance to prevent her death and those of three classmates.

A frustrated writer has 5 mysterious women turn up at his house, all seemingly invited and all must adhere to strict rules, they all pay him a million yen as rent. Who is responsible for the invites?