Yuichiro escapes from captivity and joins the Japanese Imperial Demon Army. But before he's allowed to fight vampires, he has to complete his first, terrifying mission-- make new friends with his fellow aspiring monster slayers!Yuichiro and his friends are kept as vampire fodder in a creepy institution masquerading as an orphanage. One day, Yuichiro's dreams of fighting back are realized when the orphans stage a daring escape. But things go horribly wrong, and his dream is kept alive at a cruel price.

    . . .When you thirst for revenge, there’s a surefire way to get it: Simply go to the strange website that appears only at midnight, and enter the name of your enemy. The Hell Girl will appear to drag your tormentor to eternal damnation. But you will have to pay a price . . . your soul!

    But shortly after school begins, the twins uncover a dark, mysterious secret: Students have been known to walk off into the surrounding bushlands, where they have vanished completely, without a trace!