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 appeare