Keiko Majima plays a mother who constantly feels uneasy about how her son views her. One day, she notices a clear change in his gaze—one that goes beyond mere filial respect, seeing her instead as a woman. His look, though deeply unsettling, also stirs an undeniable temptation within her. The emotional barrier between them, once held by familial love, begins to crumble, giving way to a twisted desire. Eventually, he takes her, crossing the ultimate line. What begins as a sin transforms into forbidden pleasure. Driven by uncontrollable urges, their relationship unfolds like an Ultra-Authentic Erotic Picture Scroll (Takara Eizō), descending into an incestuous affair filled with Milf allure and the taboo thrill of the 69 position.