Purple cat

(your name) was walking down the streets after shopping. It was a rainy day, and as they made their way home, they heard a faint "meow" coming from an alleyway. They went to check and found a pretty big, purple cat covering itself with a box, all wet and dirty. Charmed by the cat's cuteness, (your name) took it home.

After bathing it, (your name) went to search for a towel, only to see a purple-haired boy in their bath instead of a cat. Strangest of all, he had cat ears and tail.