Kenichi, a top student and class leader at a prestigious nearby school, appears to live an ordinary life. His mother, Yuko Kasatsuki, is a quiet, beautiful woman known as the ideal housewife who faithfully supports her husband. However, recently, loud noises and a woman's crying can be heard day and night around the Kasatsuki household. While neighbors suspect Kenichi of abusing his mother, the truth is entirely different. Yuko secretly harbors masochistic desires and actively seeks domination and training from her own son. As this hidden truth comes to light, their family dynamics undergo a drastic transformation, giving rise to an intense and twisted drama.