Nanako was taken by her busy husband to live with her father-in-law, who lives alone. Her husband is a workaholic, and Nanako is dissatisfied with him. Her father-in-law, Genzo, treats Nanako kindly. Nanako finds comfort in her father-in-law, who is spending more and more time with her, in place of her husband, who spends less time with her. Then, one night, feeling lonely after her husband falls asleep before Nanako heads to her father-in-law's bedroom and rubs her skin against him as he sleeps quietly...