After the battle with Kamui, the next stage for the Decay of the Angel plan commences - turning people into vampires and eventually controlling the humankind. The United Nations decides to release One Order, an ability weapon that can help suppress the vampire infection. Knowing Kamui's identity, the Armed Detective Agency also plans their move to retrieve the weapon.

Kunikida finds himself in the middle of Yokohama, he is faced with an unusual situation. he was infected by Bram's ability