Servamp (2016)

The story revolves around a 16-year-old boy named Marihu Shirota 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.