Due to family circumstances, Arika lives with her son. One day, her son Kazuya brings his friend Suzuki home. Feeling sympathy for him living alone, Arika kindly takes care of him, but... Suzuki, who was desperate for maternal love, feels the intense lust typical of adolescence due to her kindness, and he forcibly approaches her with his raging cock. Her body, which had forgotten pleasure for a long time, is easily turned into a female by the young man's endless thrusts. Unable to resist the rising emotions, Arika finds herself under him...