When I was fired, I somehow became a little girl and became a pet of the Demon King. Kadokawa Dwango Books

Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.

I, Presea, who had been overworked as a saint who would establish a boundary between the human world and Makai. In addition, I would be executed for an innocent crime. When you wake up, you will be in the Satan Castle. For some reason, I returned to the form of a young woman with the power of a saint, and decided to live in Makai as the pet of the Devil King! I am happy every day surrounded by cute dresses and sweet snacks, but there are many things that will reveal my identity! Moreover, there seems to be some secret to the Devil King? The heartwarming of the young woman and the Devil King sometimes escapes and the dangerous days begin!