Arika lives with her mother and child due to family circumstances. One day, my son Kazuya brought his friend Suzuki home. Arika sympathizes with him and takes care of him out of kindness, but... Suzuki, who was intensely hungry for maternal love, felt the intense lust typical of adolescence due to her tenderness, and forcibly approached her with his raging cock. A body that has long forgotten pleasure is easily turned into a female by the young man's endless pistons. And Arika can't resist the rising emotion, and before she knows it, she falls under him...