Servamp

Servamp (サーヴァンプ-) is a manga written and illustrated by Strike Tanaka.

Plot
The story revolves around a 16-years old boy (15 at the beginning of the story) called Mahiru Shirota who likes simple and dislikes difficult things. One day he picks up a stray, black cat he finds in the middle of the road and gives it the name Kuro. From this moment on a contract between the servamp Sleepy Ash and Mahiru is formed and Mahiru is being pulled into the servamp war.

"Servamps", deducing from the two words "servant" and "vampire", are vampires that are able to form a contract with a human, the so called "Eve" and serve them in exchange for drinking their blood.