Ayumi is always quiet and reserved by nature, but she genuinely rejoiced when her shy son Kenta brought home a friend. That friend, Sasaki, appeared to be a kind, top-performing student—respected by teachers and popular among classmates. However, behind his model-student facade lay a dark, hidden agenda. Sasaki saw his friendship with Kenta as nothing more than a game, and had set his sights on claiming Ayumi's body. His secret plot to possess Ayumi's unconsciously alluring big-titted milf figure gradually turned into reality...