Kikue Iiyama, 54 years old. After 30 years of marriage, her husband has gradually forgotten her existence. At home, only her unemployed son remains—returned after a failed marriage. One day, her son comes back with a disappointed look after another unsuccessful job search. Wanting to comfort him, Kikue turns to her son for emotional support, but he seeks something more physical. Though she resists at first, her body—untouched for over seven years—can't withstand his advances. The emotions born in the cracks of daily life give rise to a new, forbidden relationship.