A love story of a sweet girl named Setsuna, who never can confess her feelings to her childhood friend, because she is afraid of ruining even the little they have as friends. Therefore, she simply prefers to sigh in secret, and pleasures herself from time to time by thinking of Kin-chan, as she used to call him. So, one day, she is caught doing this by her trainer, who, as it turns out, has also had a soft spot for the girl for a long time, and in fact is constantly watching her, but he is tired of putting up with it, and now what does Setsunu have in store?