A college dropout named Nami invites her son to go on a hot spring trip together, hoping to escape their mundane lives at home. Unbeknownst to her, she has been secretly involved with him for some time now. Despite feeling conflicted about having sexual relations with her step-son, even though he carries his father's features, they give in to temptation during their vacation. As they make love, Nami finds herself unable to resist the tight grip of her stepson's manhood, losing control multiple times over. This taboo story explores the complexities of forbidden relationships between family members. Note that recording methods may vary depending on distribution method.