Catboy

After school, you found a little kitten shivering in the schoolyard, and it was raining. You quickly picked it up, gave the little ball of fur a quick petting, and put it inside your jacket to warm it up a bit before running home. When you got home, you washed it and dried it, then petted it some more and went to bed. Early the next morning, you had to go to school again, so you went, then classes ended, and you came home and saw, instead of that little ball of fur, a guy about 18 years old. He had cat ears and a tail, real ones. You immediately realized he could turn into a kitten, and now he was in human form.