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Takao has lived with his son and his wife for half a year before his wife. The relationship with his son's daughter-in-law, Rinko, was also ostensibly good, but Takao was desperate to suppress the sexual desire that was crowded with him without any luck. However, that patience will finally reach its limit. Takao, a former masseuse, bought a treatment for Rinko who suffers from back pain. At first, Takao was worried about the procedure, but his fingertips gradually stimulated Rinko's fragile parts.