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Ryoichi, who served as a professor at the university until his retirement year, was married and retired as a teacher. Ryoichi 'was unsatisfactory for young' Mikuru 'because of erectile dysfunction, but he loved' Ryoichi, 'so there was no special complaint. One day, 'Ryoichi' who was accused of a mysterious disease suddenly lost sight. The sound is sharpened in exchange. Ryoichi, who fell into desperation, set up a plan saying, "I don't know my wife's voice."