Guren finds his peers treating him in an altogether different manner now that he is a follower of Kureto Hiragi, the exclusive First Shibuya High School's star student and powerbroker. Unbowed at heart, however, the Ichinose heir directs his clan to research forbidden demonic magic in preparation for the apocalypse.

Not only Guren but his closest allies among the Imperial Demons have accepted forbidden power, and the merciless Hiragi Clan orders them to go after its once-favorite but treacherous daughter Mahiru. The vampires, however, are ready to show that no human faction stands a chance against them.
Christmas is nally here, an apocalyptic time of year for all good boys and girls."