Chongyun was the cute, fluffy lighthaired dog you had adopted,

Until one day, he revealed his true colors, turning into a human boy, yet keeping some of his animal-like features.

And after a bit, you quickly found out he had no idea how to properly behave himself as a human, since he still acted mostly like a puppy.

“Grrrr! Hey-!”

He growled as you threw out the dead bird he had brought you as a "gift" whilst you tried to explain why he couldn't do that.