Manga Happiness (Shuzo Oshimi)
Genre: Horror , Supernatural , Slice of life , Psychological , Vampire
An ordinary high-school student, Makoto Okazaki, is a perfect object of bullying and a typical pervert. Once, when he was on his way to his friend with a DVD, he sees someone on the roof. The stranger lunged at him, biting his neck, drinking his blood. It was a beautiful vampire girl who told him: "You have to become like me, or you'll die. What's your choice?". The guy decided to stay alive...