Mayuko (pseudonym) has been drawn to anal pleasure since childhood, and throughout elementary, middle, and high school, she repeatedly engaged in anal masturbation alone—her fetish already deeply rooted. However, upon graduating college, she felt "this can't continue" and decided to suppress her anal desires, choosing instead to live as an ordinary woman by becoming a teacher. Through fate, she married a man and gave birth to a daughter, briefly building an ordinary family life. Yet her innate, intense anal masochistic desires could not be fully suppressed, and before long, she began secretly performing anal masturbation in the restrooms at her workplace, an elementary school. Her actions were accidentally discovered by a parent, N, a sadistic man with a fixation on anal play, setting off a new chain of events. This video features extremely fetishistic and erotic footage of Mayuko being tormented through her anus by N, climaxing repeatedly. It depicts highly unusual acts such as self-anal fisting, anal fist fucking with glow sticks, and even inserting 20 colored pencils previously used by schoolchildren into her anus. This work consists of submitted footage filmed by amateur BDSM enthusiasts themselves, with no scripted acting, production, or narrative typical of commercial adult videos. Raw and intensely lewd, this is a compelling piece that captivates viewers with its authenticity.