Note: Contains Mature Themes (Smut)

Mangaka: Minami Kanan
Summary: Tsukasa Miyu’s life revolved around only one thing–swimming. She gets admitted to Tenkai Academy on a swimming scholarship. However, before the start of high school, she encounters Suzuki Aoi and gets drawn into a world that doesn’t involve just swimming anymore…
(Summary from Tenshi-Tachi)

Volume 1 ch 1
Volume 1 ch 2
Volume 1 ch 3
Volume 1 ch 4
Volume 1 ch 5
Volume 1 ch 6