Slender and beautiful wife, Ayaka, had her heart stolen by an SM magazine she discovered deep inside her grandfather's shed as a young girl, leading her to view her buttocks as a source of pleasure. As she entered puberty, she became obsessed with anal masturbation, though she could never voice this desire. Growing up, she became a nurse and married at 27 to a seemingly ordinary husband who appeared to have "not a single abnormal sexual tendency." Yet, amid their gentle, peaceful life, she meets a dominant S-man who could be described as even more of a pervert than herself. Through him, Ayaka fulfills her childhood fantasies—her anal pleasure realized through being tied up, tormented in the ass, and drenched in filthy talk. Witness the turning point of her life as she reveals her taboo, lewd self as a married woman whose ass is subjected to the ultimate degradation.