In a world where people are bought and sold like merchandise, Sui is used as a tool for pleasure, trained and put on medications to suppress his growth. One day, he is saved by a man known as "the Demon," who hunts down evil owners and punishes them with death in the name of "self-defense." With him, Sui can enjoy hot drinks, relaxing moments, hot baths and sharing a warm bed... Despite being unable to hide his trained responses, he discovers warmth and freedom. As does the Demon... The two start to relax, spending sweet time in their apartment...