Mayuko (pseudonym) has harbored a strong interest in anal pleasure since childhood, spending her elementary, middle, and high school years repeatedly engaging in solo anal masturbation. However, after graduating from university, she felt that continuing this way would leave her with no future, and resolved to suppress her anal desires and live as an ordinary woman. As a result, she chose a career as a female teacher, got married, and gave birth to a daughter. Yet her innate, extreme anal masochistic tendencies remained deep within her psyche, eventually resurfacing and drawing her back in. Secretly, she began repeatedly performing anal masturbation in the restrooms at the elementary school where she worked. Her actions were accidentally discovered by a parent, Mr. N, pulling her into a new series of events. This video depicts the obsessive relationship between Mayuko and Mr. N. Mr. N shares her anal fetish and possesses sadistic tendencies, tormenting Mayuko's anus and bringing her to climax repeatedly. Main content includes anal insertion using vibrator tips, foreign object insertion into the anus, extreme anal stretching, as well as milk enemas and defecation. This work is a submitted fan video filmed by amateur BDSM enthusiasts, featuring no scripted acting, production, or narrative elements typical of commercial AVs. It is recorded as raw, explicit footage.