Kazami and Kaga are the ace of the swimming club and rival each other. I felt frustrated with Kaga, who swims fast even though he's flirtatious. Kazami practiced detention every day. One day, his leg hangs during detention practice and he almost drowns. It was Kaga who helped him. Kaga advises that it is because his muscles are tense, He touches Kazami's ass as it is. Kazami feels like it's the first time Are you starting to feel strange...?