Minako Kirishima, a married woman in a loveless marriage, has been living separately from her husband after more than a decade together. Her husband has taken a mistress, leaving Minako to endure her loneliness in silence, too afraid to take the step toward divorce. Seeking emotional clarity, she decides to go on a solo trip. During this time, a man she recently met on a dating site suddenly calls her. Though it's their first conversation, his warm demeanor deeply moves her. Opening up slightly, Minako agrees to meet him when he invites her on a fishing trip. As they spend the day fishing together, their emotional bond grows, eventually leading to a physical relationship.