Angel Beats! (2010)

For most, life ends after death, but not for this group of teenagers, trapped in a high school teetering between the lines of life and death. Frustrated at their premature and unfair deaths, the teens stage a rebellion against God, desperate for their lives to have amounted to something. But as time passes, it becomes clear that their purgatory is not what it seems, nor is the quiet angel they fight against.