The series 'Zero no Mono' follows the brutal and sexually-charged journey of Midori, a bio-engineered 'Zero' model created as the ultimate pleasure slave and living weapon. Her existence is defined by her 'Master,' to whom she is bound by absolute obedience. The narrative unfolds through a series of hardcore encounters where Midori's body is ruthlessly used and explored in graphic detail. Each episode showcases her being subjected to intense and varied sexual acts, from deep-throating and creampies to group encounters and the use of her bio-engineered orifices for maximum pleasure. The plot delves into her internal conflict and burgeoning consciousness as she is forced to service different men, her programming compelling her to perform increasingly degrading and extreme acts. Her body is a canvas for carnal exploration, with scenes explicitly detailing every penetration, ejaculation, and orgasmic reaction as she fulfills her purpose as a mindless fucktoy, slowly awakening to the horror and pleasure of her existence.