Ayako had formed a relationship with her only son, Katsu. To keep it hidden from her husband, she meticulously continued her affair with Katsu, but as Katsu entered puberty, he became increasingly bold, captivated by the pleasure of sex. Ayako was on edge, constantly worried they might be discovered. However, as Ayako's body continued to crave Katsu, she couldn't suppress her sexual desire. Today, the moment her husband left, the two shared a passionate kiss.