Kenkoo Zenrakei Suieibu Umishou

Synopsis

Based on the shounen manga by Hattori Mitsuru, serialised in Weekly Shounen Magazine.

Kaname Okimura, 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 teach 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 Okimura, because she reminds him of a mermaid-like creature he saw only once in his early childhood.