Books like the tatami galaxy

The Tatami Galaxy (四畳半神話大系, Yojōhan Shinwa Taikei, literally "4½ Tatami Mythological Chronicles") is a 2004 Japanese campus novel written by Tomihiko Morimi and published by Ohta Publishing. Its first-person narrator is an unnamed upperclassman at a Kyoto university reminiscing on the misadventures of his previous years of campus life, with each of the four chapters taking place in parallel universes in which he is enrolled in a different university society.

The novel was adapted into an 11-episode anime television series by Madhouse directed by Masaaki Yuasa, which aired on Fuji Television's late-night Noitamina programming block from April 22 to July 1, 2010. The Tatami Galaxy won the 2010 Japan Media Arts Festival Grand Prize in the Animation Division and the 2011 Tokyo Anime Award in the Television Category.