Tsugumi (Tsugumi Akari) is 27 years old and in her fourth year of marriage. She used to work in the entertainment industry but retired when she married Yuta, a photographer, and has since been living as a housewife. By chance, she participates in a model photoshoot and meets a young male model, crossing a line with him that shakes her sense of reason. Facing a man's penis for the first time in a long while, she is overwhelmed by uncontrollable passion. She never imagined sex after such a long break could feel this good... This forbidden affair begins to stir her heart.