Kenkou Zenrakei Suiei-bu Umishou

Kaname Okiura enrolls at Prefectural Umineko Shougyou High—better known as Umishou—and joins the swimming club with a simple goal: learn to swim. The problem is that the club’s lineup is packed with eccentric personalities, and finding someone who can actually teach him proves harder than expected.

Things get even more unpredictable when Amuro Ninagawa transfers in from Okinawa and signs up. Bright and carefree, she stuns the team with incredible speed underwater and a highly unconventional technique—along with a habit of swimming nude that draws plenty of attention. For Okiura, her presence is especially unsettling, since she brings back a vivid childhood memory of a mermaid-like figure he once saw.