Misaki (27 years old). A married woman in her third year of marriage, doesn't look like a mother. She enjoyed a sweet life during the early days of her marriage, but everything changed after the birth of her child. Overwhelmed by housework and childcare, her stress intensified—especially due to her husband's lack of involvement in parenting. The loneliness and dissatisfaction she felt at home piled up day by day, pushing her to the brink of breaking point. Since she was pregnant during her honeymoon period, this trip marks her first vacation since getting married. Seeking temporary freedom, she meets a man at an outdoor hot spring and is drawn into intimacy with him. Feeling like she's finally let go, she actively pursues pleasure, straddling him and grinding her hips wildly as she seeks release.