Kenta, the son, was filled with resentment toward his mother, Mika, and their relationship had deteriorated into escalating domestic violence. One day, while sexually harassing her, Kenta noticed that his mother's pained expression carried an unexpectedly erotic allure. He sensed a shift in her demeanor—something had changed. Unbeknownst to him, Mika had already begun to pledge obedience, finding pleasure in serving her son as her absolute master, her latent masochism awakening both mentally and physically. Embracing her role as a sex slave, her dependence on Kenta deepened each day, driving her to crave increasingly extreme training sessions. Immersing herself in a life dominated by his cock, Mika began pursuing her own pleasure through submission. In this way, their mother-son relationship repeatedly crossed new boundaries through exhibitionist training.