Yui, a former elementary school teacher, fell in love with her colleague Makoto and got married. She was living a blissful married life. One day, she unexpectedly ran into her former senior teacher, Kimura, in her neighborhood. It turned out that after Yui's retirement, she had to leave her teaching position due to a bullying incident with parents. Kimura, who had been a lively and energetic teacher, had completely disappeared, leaving Yui feeling sympathetic. Unbeknownst to her, this reunion was not a coincidence but a deliberate plan by Kimura. Yui would soon find herself unable to resist Kimura's advances and end up in a relationship with him, a fate she couldn't have foreseen at the time.
