Survive as the villain’s pet weasel

Synopsis:
I possessed a weasel prisoner in a world where prisoners are persecuted.
You need to eat gems to maintain your human form. Every day too!
By the way, did you rob the safe?
“Let’s steal.”
In order to survive, he decided to steal the legendary jewel ‘Kleia’s Tears’ in the imperial palace.
* * *
Polished hard shoes touched the white fur strewn across the flower bed.
“It’s a weasel.”
The gleaming golden hair flowed down his tilted head, his eyes wide open.
“It’s white… … , small.”
When I woke up after fainting, I became the prince’s pet weasel?
“Beep?”
* * *
The double life of a pet weasel and a maid that started out of nowhere!
But why can’t I see the jewel I’m looking for, and I keep running into only the beasts with their own stories?
‘We have to leave here before the original story begins.’
My only goal is to survive with the weakest body!
Will I be able to survive?