Kenkō Zenrakei Suieibu Umishō (ケンコー全裸系水泳部 ウミショー?, lit. Kenkō Nude Swimming Series Umishō) is a manga series written and illustrated by Mitsuru Hattori, which has been serialized in Kodansha's Weekly Shōnen Magazine from issue 33 of 2005 to issue 21-22 of 2008. It has been adapted into an anime TV series, directed by Kōichirō Sōtome and written by Mamiko Ikeda, which premiered in Japan on numerous television stations from July 2007, and a video game.
Read more about Kenkō Zenrakei Suieibu Umishō: Plot, Characters