After working at an insurance company for three years, Ayane finally gets assigned as a sales representative. However, her shy personality makes it difficult to secure contracts, and the mounting pressure begins to crush her. At home, her relationship with her husband grows increasingly strained. One day, she reunites with Sakuai, her senior from high school, during a sales visit. His gentle and understanding nature—just as it was back in school—becomes her only source of comfort, and before long, visiting his place becomes a regular habit. One day, their relationship crosses the line into physical intimacy. Though overwhelmed with guilt, Ayane finds herself drawn to Sakuai's tenderness—the one person who truly accepts her—and she can no longer forget the emotions he awakens in her.