Several years into her marriage, Kaori found herself growing distant from her self-centered husband, feeling increasingly unloved despite carrying on with daily life. It was then that she met Sasagi, a client from her part-time job. His calm, gentle demeanor and warm presence gradually drew her in, sparking romantic feelings she hadn't felt in years. However, her intensely jealous husband made it difficult for anything to develop between them. When an invitation to her all-girls high school reunion arrived, Kaori clung to the hope of seeing "that person" again and began secretly planning a trip with Sasagi—an opportunity to finally take their affair further.