Petopeto-san (ぺとぺとさん, Petopeto-san) is a light novel series by Kou Kimura, with illustrations by Yug. An anime adaptation ran from July 9, 2005 to October 1, 2005. The show takes place in a Japanese school where everything is normal, except for students from what are called "specified races." The specified races are based on yōkai from Japanese mythology, for example, one student on the swim team is a kappa, while another, a nurikabe, merges with walls and is popular in the summertime for having a very cool temperature.