Yuri Nakamura recruits 17-year-old Yuzuru Otonashi into the Afterlife Battlefront, a faction fighting the school's god-like student council president, Kanade "Angel" Tachibana. But Otonashi has doubts about whether the group's actions are right. Rather than simply accepting Angel as his enemy, he crosses the battle lines to understand her side of the fate they share.
Otonashi arrived without any memories, waking in a realm between life and death that resembles a high school. It shelters people who suffered unwanted deaths. Believing God wronged them during their lives, its residents formed the Battlefront to resist Angel and gain control over their own lives. Newly drawn into their rebellion, Otonashi must make sense of both the strange place he has entered and the conflict Yuri has asked him to join.