Twelve years into her marriage, Yumi (pseudonym) found herself caught in the daily grind of her husband's work and caring for her son, who was preparing for entrance exams. Then, suddenly, temptation struck—an unexpected spark ignited by her son's young homeroom teacher, who came for a guidance consultation. In truth, it was Yumi herself who devised the plan to use her son as a pretext to seduce him. The fear of being exposed to her son and husband only intensified her arousal. On the surface, their meetings appeared to be about parental guidance, but in reality, each encounter was meticulously orchestrated to fuel her desires. As a result, the sex in her marital bedroom only pulled her mind and body deeper into the affair. This is the story of a woman in her forties, a milf embracing her own lust, using her son's presence as cover while chasing new pleasures.