"Ma... Masaru-sama..." murmurs Aso Kyoko, a beautiful single mother, her expression tinged with sadness. She has long been submissive to her son Masaru, who rules their household as a tyrant. Masaru strictly inspects his mother's underwear, forcing her to change them on the spot, and even uses his phone to command Kyoko to lure neighbors into their home, indulging in increasingly outrageous behavior. Over time, Kyoko grows accustomed to obeying her son's demands—so much so that she begins to anticipate and take pleasure in his commands. Her emotional transformation is portrayed with care, revealing a deeply intimate bond that transcends the conventional master-servant dynamic.