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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. The chapters are collected into tankōbon volumes published by Shueisha. As of December 31, 2016, there are 20 volumes released. A television anime adaptation by J.C. Staff and EGG FIRM aired last July 4, 2016. The series is being simulcast by Funimation, who began releasing an English dub from August 7, 2016.

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.