The story was about a guy named Eiri who was haunted by Cossette who insisted a help coming from him.
Okay. The book was so creepy in a good way. I like the killings in every chapter, the mystery of Cossette, the way Eiri helped the girl, and also the graphic was really excellent.
The manga has only two volumes, its very short. Based on the popular anime. This one is worth a shot.