Too busy with work to pay attention to his wife, Yukika's husband leaves her increasingly frustrated and emotionally starved. Tonight, another call from him saying he won't be coming home tightens the ache in her chest. Left alone once again, Yukika reaches her breaking point—she gives in completely to masturbation in her solitary room. Her son, noticing his mother's vulnerable state, takes advantage of her loneliness, boldly approaching her sleeping body. He begins touching and teasing her, exploiting his father's absence as his own desire spirals out of control. From Yukika's sensitive pussy, a bittersweet wetness drips—responding against her better judgment to her son's advances. In the end, overwhelmed by longing and sensation, Yukika surrenders to her son's lustful urges.