A teenage girl named Ami lives with her father. After her parents' divorce, her father, who works at a construction site, becomes increasingly strict in monitoring her, causing growing tension during her rebellious adolescent phase. Dreading returning home, she wanders the city's nightlife after school, searching for a place to belong. One day, she's approached by a 30-year-old office worker and feels drawn to him. Knowing he's only after sex, she still gives up her virginity as an escape from daily stress and household burdens. After that, her sensitive body begins craving pleasure, and she repeatedly sneaks out to have sex, lying about staying over at friends' houses. While indulging in pleasurable sensations, she continues living with constant anxiety and guilt.