Story
Suddenly one day, the world was destroyed by an unknown virus.

Only children survived.

And those children were ruled by vampires who appeared from the abyss.

Yuichiro Hyakuya was surviving by giving blood to vampires, together with Mikaela Hyakuya and other orphans who shared bond similar to a real family.

Yuichiro could not endure being treated like livestock anymore, and tried to escape to the outside world along with Mikaela and the young orphans.


Four years later.

Yuichiro has enlisted in the ＂The Moon Demon Company＂, a Vampire Extermination Unit of the Japanese Imperial Demon Army. He devotes himself into fighting against formidable vampires!!