Angel Beats!: Heaven's Door

In a world after death, Yuri, the leader of the Shinda Sekai Sensen, rebels against the god who destined her to have an unreasonable life. On the other hand, Tenshi (Angel), 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 angel's harnessing supernatural powers. A prequel to the anime, showing the formation of the Afterworld Battlefront. The novel version covers the first 23 chapters of the manga.