After losing her husband in an accident, Hitomi struggles to properly care for her son, Takashi. During a parent-teacher conference, she is shocked to learn that his grades are not improving. Takashi declares that he'll work harder if she lets him suck her breasts, leaving Hitomi with no choice but to offer her chest. His demands quickly escalate, ultimately leading to full intercourse. As emotions and desires intertwine, their complicated relationship grows deeper.