Brothers Kei and Shinobu are both part of their school’s swim team. One day, while pining after his brother, Shinobu is approached by the team’s star swimmer, Kuji, and sent for a wild ride. Kuji uses Shinobu’s body in any way he pleases anytime and anywhere. Shinobu has had enough, but allows his torment to continue in order to protect his brother.

As Shinobu and Kuji start to become close, Kei reveals his own love for Kuji along with another startling surprise. Meanwhile, a new student enters the swim team and begins to form a bond with Kei. Can this new swimmer replace Kuji in Kei’s heart or will the love triangle continue?