The hot spring ryokan where Rina works as the proprietress is her mother's parents' house, and Rina has been the proprietress for 20 years because no heir can be found. Rina, who originally had a strong libido, relieved her accumulated stress by masturbating exclusively at her work as a landlady. One day, a student from her previous job as a nursery teacher came to visit her, saying, "There is something I want to talk to you about." The consultation was that she "cannot confess to the woman she likes". On top of that, the student was still a virgin. She decides to do her best for the sake of the virgin.
