Sarazanmai

Sarazanmai is a Japanese anime television series jointly produced by MAPPA and Lapin Track. The series aired on Fuji TV's Noitamina programming block from April 11 to June 20, 2019, for eleven episodes, and follows three middle school students who are transformed into kappas in order to collect shirikodama, mythical balls located in the anus that contains the physical manifestation of one's desires; Ikuhara broadly developed the series as a story about yōkai for an adult audience.

From Wikipedia, licensed under CC BY-SA 4.0.