A bud that belongs to the swimming club and spends all day practicing. Natsume, a beautiful teacher who is an adviser to the swimming club, aims for such a bud. Natsume uses her position as a teacher to set up lesbian sexual harassment on the buds. I think that the serious bud is for swimming and accept it. Tsubomi, who was straight, reacts unintentionally to Natsume's unpleasant tongue tech and knows Lesbian Iki. Will it fall into a soft lesbian sexual intercourse different from a man as it is?