Ordinary university student Ryu Dan-woo…

…gets chosen(?) by a young demon he met on the street.

The demon followed him into his studio apartment and made itself at home without permission, and from that day on, Dan-woo’s ordinary life becomes completely tangled.

To return to his original daily life, along with his university classmate Si-deok and the witch Ju-eun, he begins searching for clues about Dimensional Magic…