Since childhood, Mayuko (pseudonym) became obsessed with anal pleasure after secretly watching her elderly aunt defecate outdoors. Throughout elementary, middle, and high school, she repeatedly engaged in anal masturbation alone. After graduating college, she resolved to suppress her abnormal desires and chose to live as an ordinary woman, becoming a teacher. Eventually, she married and gave birth to a daughter, seemingly leading a normal life. However, her innate anal masochistic urges proved uncontrollable, and she gradually began secretly performing anal masturbation in her elementary school's restroom. Her act was accidentally discovered by a parent, N, leading to a shocking turn of events. This video realistically depicts Mayuko being tormented in various ways by N, a man with a sadistic personality and an anal fetish. Claimed to have been sent to the editorial office of an SM magazine, this footage offers a disturbing glimpse into her deep-seated sexual desires and their real-life manifestation.