Name this manga!

Saw one page of it on a forum I visit. Would really like to know the title so I can check it out. It contained the following: -A creepy-looking man with nails for teeth -His only dialogue was 'All those that find out my secret must die!" -There is a younger gentleman running away from him -He gets shot in the ass with a nail Yeah... That's all I've got. Work with me, guys! Plz and Thx =)