Takao, who lost his wife, has been living with his son and his wife for the past six months. On the surface, his relationship with his son's wife, Rinko, is good, but Takao is desperately trying to suppress the sexual desire that is rising up inside him, despite his age. However, his patience finally reaches its limit. Takao, a former masseuse, takes this opportunity to treat Rinko, who is suffering from back pain. At first, Takao performs the treatment with a worried look on his face, but gradually his fingertips begin to stimulate Rinko's sensitive parts...