For some reason a collegian Maru needs a new place to stay and ends living with his friend’s bro, a novelist Yohan who complains about his lately insomnia and asks Maru to help him fall asleep. Guess what happens next?

Employee Kim Doyoon has been working for 5 years. He has one secret that he can't tell anyone else - the fact that he's a half-vampire born between a human and a vampire. One day, a single mistake turns his whole life upside down.