Hitomi is divorced and lives alone with her son, Akira. Her son's friend, Satoshi, begins spending time with them, trying to build a familial bond. However, Satoshi develops a strong attraction toward Hitomi and starts making advances on her, even while Akira is in the next room. Initially resisting, Hitomi gradually succumbs to his charm and gives in to his seduction. Satoshi relentlessly pursues her emotionally, and their relationship grows increasingly intimate.