This role-play is performed by adults. Reina has always had feelings for a senior who lives in her neighborhood, and her love for her remains unwavering even now, and she joins the company where that senior works. However, my senior has a girlfriend... Reina, who has feelings that have nowhere to go, is consulted by a senior about having sex with her. ``...Then why don't you practice with me?'' Whatever the reason, Reina feels the momentary joy of being able to interact closely with the person she likes, but... This is an erotic love story in which a secret practice brings two people closer together.