Since childhood, the demon Shinoa has had a difficult life. Because her older sister associates with the wrong people, her parents have very high expectations of her. Shinoa is their last hope. When she is expelled from school after a bad incident, her parents turn away from her in disappointment and shame and disown her. Shinoa initially works as a barmaid to make a living until fate has her take a job as a maid for Lucifer, the king of hell, who rules his kingdom with an iron hand and knows no mercy, with the intention of protecting it from traitors. However, his devilish character does not prevent the yellow-eyed demon from feeling magically drawn to him...