Blood Contract

Blood Contract summary:

Because modern-day Zero accidentally transported himself to a foreign world, the first thing he saw when he opened his eyes was a giant slave s.h.i.+p and he became the s.h.i.+p’s new slave. This was a place where the strong ate the weak. As a new slave, he would have to face his slave master and additionally get bullied by others. The most unthinkable thing was that creatures known as vampires existed.