Choi Sooyoung is an average student girl, she loves to spend time with her best friends Yuri and Kai. After moving alone to Seoul with her dog, this one suddenly turns into a human after signing up a magical contract. Apart from having Yoona as a roommate, everything was normal. 

Having days full of stress and a lot of work something happend to her in a  near park.

A tail and cat ears it appeared!

Asking Yoona for explication and help, she discovers that someone has a put on her what seems to be a curse. At that moment her best friend Sooyoung had before came back! Luhan, her old crush and his best friend new crush ,Sehun made the situation more complicated. 

Everything she new about the people around her could be just a mask hiding behind something else.

Now she will have to find a way back to being human...