Closed single-parent household

Hitomi, a mother who lost her husband and lives with her son Takashi. She always had a reputation as a cheerful and cheerful mother, but at home she spent her days being humiliated as her son's obedient sex slave. However, Hitomi can't stand Takashi's humiliating play that continues day and night, so she consults Takashi's homeroom teacher, Yamashita. However, Yamashita already knows about what happened with Takashi, and begins to grope Hitomi's body, telling her that it was all a trap set up by Takashi. Feeling in danger, Hitomi tries to run away from the scene, but...