Angel Beats Heavens Door Graphic Novel Volume 03

"Angel Beats!: Heaven's Door takes place at a high school acting as a limbo for those who have died, where students learn to give up any lingering attachments they still have from life before passing on. The story follows the main protagonist, a boy who has lost his memories of his life after dying. He meets Yuri, a girl who invites him to join the Afterlife Battlefront, an organization she founded and leads which fights against God for the negative experiences the students went through in life."