Asami, a 29-year-old housewife, constantly argues with her cheating husband, leading to a strained marriage. One Sunday morning, she finds a hickey on his shirt while doing laundry, sparking another fight. Her husband tells her to leave, and she encounters Tatsu, the university student living next door. Concerned, Tatsu listens to her situation at home. His kindness and understanding cause her emotions to boil over.