Yurine, living alone with her son after her husband went on a long business trip. She's been worried about her reclusive son lately, but one day he brings over his friend, Saki. Saki, who grew up in a father-only household, craves maternal affection and becomes attached to Yurine, who reciprocates his feelings. However, driven by a twisted longing for his mother, Saki desires intimacy with her and takes advantage of her kindness to pursue her. Yurine is relentlessly ravaged by his erect cock, which stands firm like a wild animal, thrusting into her again and again. Her womb, long forgotten, awakens to pleasure once more...