Three centuries ago, a vampire by the name of Migiri was running a reign of terror across Japan when a hero named Naonosuke Kobayashi cut off his head and sent him to eternal rest... until now.

From Dark Horse:
Misaki Saiki, a young woman with a troubled past, is a professional dominatrix in one of Tokyo's most exclusive S&M clubs. However, her real money is something she likes even less than being a dominatrix. Ever since childhood, Misaki has had the ability to see and communicate with ghosts, and that talent is put to use by the Livelihood Protection Agency, who pairs Misaki with Souichiro Kadotake, a martial artist who happens to be deathly afraid of ghosts. Using her gifts, Misaki is able to help troubled departed spirits resolve what is troubling them and allow them to move on to the afterlife. If all THAT isn't odd enough, Misaki is an albino and a virgin.

Kai is followed by the invisible Fuu who claims that his classmate Yomi is a witch. Then another strange girl transfers into his class.

Houdzuki Maika is a high-school girl who, in a sense, is never alone. Her twin brother Maito, who could not survive birth, lives inside of her and shares her body. They switch between who gets to live each day and they share most of their memories. However, the only times they get to see and talk to each other is when they are both asleep, where they share the same dream. Perhaps as a result of this supernatural existence, they are able to see ghosts. There will surely be many mysterious incidents ahead for these twins to face!