"GrandPops, You Can't Be Putting Your Hand Down There!" (part 1)

Rio-chan lives with her parents and grandfather. She has a problem that she cannot tell anyone. It is a relationship with her grandfather that takes place only when her parents are away.... She takes a bath with her grandfather, and he touches her body, and makes her serve him on the futon... Her inexperienced body is being played with. She is afraid to tell anyone about her grandfather's sudden change.... Help me...mother....