"Do you have time today too?" Minami, a member of the swimming club, is going on the attack for Kousuke, the hot-blooded coach of the swimming club. She's the daughter of an old acquaintance of his and back then he saw her like a little sister. There was a time when he doted on her, but right now he's trying to maintain a professional relationship as a coach and club member. However. Minami uses her own body in a ploy to spearhead the attack, and at last, she breaks through her coach's defenses and so together by the poolside.