Ayano (Rinne Touka), an office worker, is living a happy life with a promise to marry her boyfriend. One day, a female assaulter on the run notices Ayano on her way home. An assault demon who sneaks in with a gloomy smile. He rapes Ayano like a hungry beast. As a result of her words, her beloved father was also killed, and Ayano was pushed to the bottom of her misfortune. Ayano was living in a violent demon and being violated every day, contrary to her reasoning, she fell into a sex slave.
