Oyasumi, A Cat's Purrpose,
 
A manga about house cat's fighting monsters and deamons, protecting their owners of this unknown and dangerous world. We follow the main character sushi who has recently been adopted by very kind humans. He call's them mom and dan because it's the closest thing he has ever had to parents. Because of the lack of a purring mother, Sushi still has a lot to learn about the cat world!  
 
The book is around 150 pages and has two bonus stories made by Natasja van Gestel and Maze.