Kenko Zenrakei Suieibu Umisho Kenkoo Stark Naked Swimming Club

También conocida como: Umisho · GO！纯情水泳社！ · Kenko Nude Swimming Series Umisho · Kenkoo Stark Naked Swimming Club · Kenkō Zenrakei Suieibu Umishō · Umi Show · ウミショー · ケンコー全裸系水泳部 · ケンコー全裸系水泳部　ウミショー

Kaname Okiura, a student of Prefectoral Umineko Shougyou High ("Umisho" for short), joined the school's swimming club in order to learn how to swim, but the club is filled with weirdos, let alone teaches him swimming. Then, a sunny, happy-go-lucky girl named Amuro Ninagawa who was transferred from Okinawa joined the club. Her extraordinary underwater speed and unorthodox swimming style (plus her personal habit of nude swimming—a powerful magnet to teenage boys) surprised every club member, especially Okiura, because she reminds him of a mermaid-like creature he saw only once in his early childhood.