In a world after death, angels fight for their fate and their future. Yuri, the leader of the Shinda Sekai Sensen, rebels against the god who destined her to have an unreasonable life. On the otherhand, Tenshi, the chairperson of the student council for the world after death, battles against the SSS members. SSS members utilize armed weaponry to battle it out against the angels harnessing supernatural powers.
Set between episodes four and five,Yuri comes up with 'Operation High Tension Syndrome', encouraging the other members to behave as wildly as possible, so they would appear to be enjoying school without disappearing. Yuri hopes this will make Angel wonder what's happening and lead them straight to God.
A short OVA depicting events after the ending of episode 13.
An Angel Beats! audio special, containing various skits played out by Yurippe and co. Takes place during the actual show in the background of various scenes.
Set between episodes two and three, during Golden Week, Yuri arranges for the SSS to go on a deadly picnic, which involves most of the members trying to kill each other with various traps and gadgets.
An introduction to the Angel Beats! universe distributed through the PlayStation Network and later bundled on the 7th BD/DVD released on December 22, 2010.