Servamp

The story revolves around a 16-year-old boy named Marihu Shirts who likes simple things and dislikes difficult things.One day,he picks up a stray black cat he find in the middle of the road and named it Kuro.From this moment on,a contract between the Servamp Sleepy Ash(Kuro) and Mahiru is formed,and Mahiru is pulled into a servamp war between the seven deadly servamp and their eight sibling Tsubaki.