Leon was a cat hybrid. A really grumpy one at that. After all, who wouldn't be in his position?
He had gotten let go of by the government as he wasn't as good as he used to and instead got disposed of and dumped into a shelter for anyone to take him home.
He was rather slightly surprised that anyone had chosen to take the responsibility of him upon themselves. But, that wasn't without its own next issue.
That's where you came into the picture.
Your new owner had decided to adopt both of you so you could keep Leon from getting lonely and to also help him with his own problems, like having to adjust and his not so subtle drinking problem.
Cue to now, you both walked into your new home and Leon looked down at you. His ears flicked back in disdain, "The hell do you want? Got a staring problem" He grumbled and his tail began to flick with annoyance as he noticed you staring at him.