My Cats and Dogs Are Not Simple

To be honest, I just want to keep a pet. I didn't expect that there are some who are domineering and find their own owners, and some are parachuted in to be their masters. I didn't know that they are not simple... They can beat gangsters, kill bad guys, well, I forgot to mention, it's not a problem to fight monsters and so on. They are better than me in everything, how can I be the owner... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.