Tanjun?←♡→Fukuzatsu?

A young man lives next door to a girl who can't help but meddle in his affairs. She notices that his lack of experience with women is holding him back in his love life. Determined to help, she decides to take matters into her own hands and offers to become his personal coach in the art of pleasing a girl.

As she takes on the role of his instructor, their lessons blur the lines between teaching and intimacy. The neighbor's intervention leads them down a path of physical exploration and unexpected feelings. What starts as a simple arrangement soon becomes complicated as their relationship deepens beyond the initial agreement.