Having become a university student, Yui is forced to move in with her grandfather, Mitsunori, for the summer vacation under the condition that she provides him with caregiving. Yui, who has always disliked her talkative and stubborn grandfather, approaches the care work half-heartedly and with a bad attitude. Mitsunori quickly becomes furious at her behavior and, drawn to her voluptuous body, begins sexually harassing and training her. As he teaches her how to properly serve him, Yui's feelings and demeanor gradually shift, transforming their relationship in unexpected ways. The tension arising from their familial roles—and how they overcome it—forms the core appeal of this forbidden caregiving story. #Bangochan P