Born as an outcast between demons and humans, Luciela was oppressed and executed by the human king, Luvaits. Just before her death, Luciela regressed and resolved to take revenge on Luvaits, heading toward the demon realm. There, by chance, she met Dylan, a boy destined to inherit the title of Demon King. Luciela decided to use Dylan’s power for her revenge, but as Dylan grew up, his feelings toward her gradually turned into obsessive love…