The Arrogant Kaiju Princess and the Detective Servant

This is a story about being abducted by aliens and ending up on an alien planet ...
An ordinary detective from Earth, let's call him "detective", is faced with an unprecedented case.
It requires him to become the pet of Dinah, a mysterious and beautiful alien girl!
This blonde girl may look cute and attractive, but there's a wild side to her, and she has no respect for any form of life. She even has the ability to summon an army of powerful monsters!
Dinah, who has a long criminal record for destroying several planets, is the infamous Celestial Tyrant!
Under her tyranny, how will the protagonist use his wisdom to survive?
As a pet, the only way for him to improve his position is to conquer planets!
His job duties are to serve Dinah, exercise, and command monsters!