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Saiki Kusuo no Psi-nan (斉木楠雄のΨ難 Saiki Kusuo no Sainan, lit. "The Disaster of Psi Kusuo Saiki") is a Japanese gag manga series written and illustrated by Shūichi Asō. Individual chapters have been serialized in Weekly Shōnen Jump since June 2012 until February 2018. The chapters were collected into tankōbon volumes published by Shueisha. As of 2018, there are 26 volumes released. The manga inspired an anime series of shorts that premiered in July 4, 2016. Funimation streamed the anime series under the title "The Disaster of Psi Kusuo Saiki" with English subtitles as it aired in Japan, and also streamed an English broadcast dub for the series. A second anime season premiered in January 2018. The series has a live-action film that opened in Japan on October 21. An app released titled '''Saiki Kusuo no Psi Nan: Bōsō Bōsō! Psychic Battle''' on April 16, 2018. The app is free to play, with some items costing extra and features an original story. Recently, it was announced by Netflix, that it will produce an original anime series.

Born with innate supernatural power, Saiki Kusuo seems to have his life easy. He possess various ESP ability including telepathy and psychokinesis among others allowing him to get anything he wants. During kindergarten, he incidentally caught media attention after rumors of how he never loses any janken match against his friends and teacher spread around town. The incident made him came to the resolve of not using his power in front of others ever again so people will not find out that he is a psychic. But upon being a high school sophomore, with all hi-jinks that ensue, Kusuo is slowly cutting his resolve loose.