Reiko Kobayakawa is the capable and ambitious president of a prestigious fitness company, known for her sharp business acumen. However, internally, she is feared by employees for her strict and oppressive management style. Among them, Koyama, a regular employee forced to constantly serve her, reaches his breaking point when he is demoted to part-time training under false pretenses following a client complaint. Consumed by rage, he spikes her drink with a diuretic. Seizing the opportunity, Koyama installs hidden cameras to capture her humiliation and begins a relentless campaign of covert recording and psychological blackmail. As power dynamics collapse and desire intertwines with cruelty, the story unfolds into a twisted tale of domination, incontinence, and degradation.