Since childhood, Mayuko (pseudonym) has been drawn to anal pleasure, spending her elementary, middle, and high school years indulging in solitary anal masturbation. After graduating from university, she resolved to suppress her desires and live as an ordinary woman, choosing a career as a teacher. She later married and gave birth to a daughter, briefly living a seemingly normal family life. However, her innate anal masochism proved impossible to control, and before long she began secretly engaging in anal masturbation in the restrooms at her workplace, an elementary school. Her acts were eventually discovered by a male parent, Mr. N, setting the stage for what follows. This work documents Mayuko, an anal fetishist, being tormented and repeatedly brought to climax by Mr. N, a like-minded sadist, through extreme anal play. The content includes anal insertion using vibrator tips, foreign objects such as stuffed toys, daikon radishes, and octopus, extreme anal stretching, and group sex involving her students. This is a genuine submission video recorded by amateur BDSM enthusiasts, with no scripted performances, staging, or narrative elements typically found in commercial AVs. The footage is raw, explicit, and intensely erotic.