Source
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The light novel is the official prequel to the anime series. It tells the story of how Yuri and Hinata meet, how they find out about "Angel" and the other characters and how the SSS was founded.
Sequel
Angel Beats! -The Last Operation- will reveal why the Afterlife Battlefront members came into this world. New Angel Beats! manga series serves as the "true arc." (Souce: MangaUpdates)
Alternative
A comic featured in the booklet joined with the CD "Last Song" of Girls Dead Monster starring marina, consisiting of two short stories: 1. Last Song, Yuriko Asami 2. The 4-Koma - Bokura no Sensen Shinoukyoku ♪ (The 4コマ 僕らの戦線行進曲♪); Haruka Komowata
Contains
A dream collaboration between 23 artists and *Angel Beats!* Yuri! Otonashi!! This is the kind of angel you've always wanted to see! (Source: Kadokawa, translated)
Cameo
Kanade Tachibana is a beautiful girl known as "Angel-chan" at school. She is traveling all over the country in search of "someone." One day, while staying in Kanagawa, she met Yuri Nakamura, a happy and cheerful girl. Along the way, other people who look like SSS members (?) also appear!? Will Angel-chan be able to find that special "someone"…? (Source: Kadokawa, translated)
Parody
A 4-koma manga based on Maeda Jun's original concept of Angel Beats!
Parody
