Kim Hyemi is the daughter of a two busy parents and younger sister of a top student. Hyemi isn't as smart as her brother but she tries hard to be as good as him. Hyemi does everything she can to please her parents but nothing satisfies them since they have a son who's the best at everything. After an argument one night, a man shows up at her home claiming to be a wish demon. He would grant her anything as long as he received her soul in exchange.

“What is your wish?”