It's been four years since her husband died, and she has been living with Ryoko since last year because she thought her daughter and her husband would be lonely. One day, her son-in-law became ill, and Ryoko let her son-in-law rest on a futon. After a while, Ryoko wiped the sweat from her son-in-law's body with a wet towel. Involuntarily, the bodies of the two become close to each other. The son-in-law felt the softness of his mother-in-law's chest and got an erection. Ryoko noticed the erection and looked away, but tried to control the erection with her hands and mouth, saying, "It's painful, it's a secret from my daughter." The excited son-in-law began to take off Ryoko's underwear ...