Mother Aoi hosts her son's friend Kawada and Ogoshi overnight for his farewell party before studying abroad. As the night progresses, the three continue talking late into the evening. Ogoshi sneaks into the bedroom and is shocked to find Aoi and Kawada together. He threatens to tell her son unless she complies, drawing her into a web of desire with her guests. Initially resisting, Aoi gradually feels her long-suppressed feminine lust reawakening, overwhelmed by the surge of passion igniting within her mature body.