This film documents an incestuous BDSM relationship between 49-year-old Yoko, a stunningly youthful and beautiful mother, and her real son, Takumi (26), in a household consisting solely of mother and son following divorce. The son's emotional attachment to his mother gradually transforms into a sexual relationship, escalating in intensity over time. Yoko consents to a physical relationship in response to her son's demands, and their encounters progressively evolve into full-fledged BDSM play. Takumi further expands their activities by involving other men and lending his mother out for sexual acts, recording everything and uploading the footage to social media. Narrated from the son's perspective, one striking statement stands out: "My mother already loves me as a man. So even though it's BDSM, being dominated by me brings her joy." At the same time, the film portrays Yoko's resistance and suffering as she is forced to have sex with other men and endure extreme humiliation. Yet, amid this, she is drawn into arousal and shame, her pussy dripping wet—sometimes erupting in powerful, gushing orgasms. As Yoko awakens to her masochistic desires, obeying her son's commands becomes proof of true love. Please witness her most shameful moments. As a true masochist, she fantasizes about being watched by others, growing more aroused the more she is exposed.