Kenkou Zenrakei Suieibu Umishou

Kaname Okiura, a student at Umineko Shougyou High, joins the swimming club to learn how to swim, but finds the club ineffective and full of odd members. When Amuro Ninagawa, a cheerful girl from Okinawa, transfers in and joins the team, she quickly draws attention. She swims with unusual speed and uses an unconventional technique. She also swims without clothing, which shocks the other members. Her presence reminds Okiura of a mermaid-like being he saw as a child.