Kota fell head over heels for a woman nearly old enough to be his mother, and now his desire has grown uncontrollable. Satomi, in fact, is his mother's close friend. While his mother is away on a trip, she asks Satomi to check in on her son. Kota is stunned to learn that his mother's friend is such a stunning, alluring woman. Trying to calm himself, he heads to the bathroom—only to find the door unlocked, with Satomi inside, caught mid-urination. This unexpected encounter becomes the spark that ignites an intense, unforgettable passion between them.