After losing her husband, Takeko now lives with her eldest son, his wife, and their three grandchildren. One day, her eldest son and his wife decide to go on a week-long trip to Hawaii, leaving Takeko to live with her college-age grandson. At first, she doesn't realize it, but she finds adult toys in her grandson's room, leading to a big shock! Despite her age, Takeko can't help but play with the toys, and her grandson, seeing this, becomes aroused. This is a forbidden love story between a mature woman and her grandson.
