After losing her husband, Shizuka lived alone once her daughter moved out following marriage. However, when her daughter's job transferred her to a branch near the family home and she requested to move back in, Shizuka began living with her daughter and son-in-law as a trio. Lately, her daughter had become busy with work, causing some strain in the couple's relationship. One day, Shizuka accidentally saw her son-in-law's naked body as he stepped out of the shower. Seeing a man's body again after so long unexpectedly aroused her, and she began masturbating. That evening, while pleasuring herself again in the kitchen, she was caught by her son-in-law. Ashamed, she tried to cover herself, but he whispered, "Let me comfort you," and moved close to her.