Kanna, a pure and delicate noble daughter, had lived a life without want or hardship. She believed her ordinary days would continue unchanged—until one fateful night when her father passed out drunk, setting off a chain of events that would shatter her world. Her life takes a dark turn with the arrival of a new secretary at her father's company. With no one to hear her cries for help, Kanna is forcibly taken and subjected to brutal training as a sex slave. Despite her hatred and resistance, as she bears the marks of rope bondage on her skin and endures the aching desire between her legs, a subtle transformation begins deep within her heart. As her former life crumbles away, the true nature hidden inside her slowly starts to emerge.