Shin Woo Yeo (Jang Ki Young) is a 999-year-old gumiho with good looks, good manners, and a sweet charm. He is very close to achieving his goal of becoming a human, while currently working as a professor at the university.However, things take an expected turn when his marble is accidentally swallowed by a college student Lee Dam.
If a human swallows the marble, they can only live for a year, and the marble will break, preventing the gumiho from becoming human. Shin Woo Yeo invites Lee Dam to live together, and their unexpected romance begins.
Lee Dam(Hyeri) is a college girl who always speak her mind. She is firm, straightforward and self-objective. She has never been in a relationship before.
Adapted from a webtoon of the same name by Na.
Also known as: 간 떨어지는 동거 Gan Tteol Eojineun Dong Geo / Frightening Cohabitation / A Falling Cohabitation/ A Terrifying Cohabitation/ Live Together