The most tearjearking anime on the whole goddamn planet
Based around a young male called Otonashi, who wakes up with no memories. He meets a purple-haired girl with a gun who informs him that he's dead, and that he should join the SSS, a group fighting against the God who killed them.
You will bawl your eyes out.
Person 1: Have you watched Angel Beats! yet?
Person 2: Are you kidded? I cried manly tears