After awaking, Otonoshi, who has amnesia, meets Yuri and learns that they are already dead and in a surreal afterlife high school, where they can die again, but later awaken with no injuries. Also Yuri heads an organization fighting against a violent female Angel who is trying to send people from there to somewhere else. After joining the organization, Otonoshi wonders if there's a reason why everyone is trapped in this afterlife limbo land instead of going to heaven after they died.
