"The only way for Nam Ji-ho, a half-human and half-ho (fox), to become a human is to spend one night with a human who ate a marble from ancient times.

However, the person who accidentally swallowed the marble is Go Gun-woo, a man.
Ji-ho is now a human . The only way to become one is to spend one night with the same guy, Geon-Woo.

After a hot night with a pretty girl, Ji-Ho, who only imagined becoming a human being, unexpectedly begins a false courtship with a man, Geon-Woo. I keep hitting Ji-ho with an iron wall… Will Ji-ho be able to become a human?"