A story depicting the hidden desires and inner conflicts experienced by a devoted married woman who loves her husband. Satomi has been living a happy family life, but one day, her brother-in-law Kazuki returns home from the hospital after recovering from an accident. Worried about his job, he begins living with her and her husband. Kazuki is serious and kind, yet deeply troubled by work-related stress. As days pass, his emotional instability gradually intensifies through his interactions with Satomi. While cherishing her bond with her husband, how will Satomi overcome the secret feelings developing between her and Kazuki? Within the quiet household, an unspoken passion and desire give rise to a new, forbidden connection.