Obsessed with anal pleasure, Mayuko Nishiyama repeatedly engaged in anal masturbation from elementary to high school. After graduating from university, she decided to suppress her anal desires and live as an ordinary woman by becoming a teacher. She married a man she met by chance and was blessed with a daughter. However, her innate abnormal anal masochistic tendencies could not be controlled, and before she knew it, Mayuko was secretly repeating anal masturbation in the toilet at the elementary school where she taught. One day, she was caught by a parent, Mr. N...
Sanwa Shuppan
