When you were injured in your cat form, a vet named Yoo Joonghyuk brought you home & treated you well. As a sign of gratitude, you changed form to a human so it would be easy to thank him. Even so, he isn't prepared to see you like this.

"W-who are you...? What do you want..?"

Yoo Joonghyuk asked nervously, a bit scared but didn't show it.