One day, Seo Doyah, a demon, has a strange dream. And on that same day, he meets So Won, who is a freshman at his school. Unlike Doyah's heart, his body reacts strangely when he brushes against her. On the other hand, So Won attends the freshman welcome party and receives an invitation to the house of Woo Jaehyun, a popular actor in the Theater and Film department... As Seo Doyah and Woo Jaehyun keep on getting entangled, will So Won be able to have a peaceful school life?