Four years after escaping, Yūichirō is part of the Japanese Army and is eager to become a member of their special vampire hunting force, the Moon Demon Company, but his reckless behavior leads him to be suspended, until a vampire attacks the local school prompting him to face the enemy against orders.

Yūichirō and his friends introduced to a new member, Mitsuba Sangū, and are then dispatched for his first mission as part of the Moon Demon Company, but when they spot a little girl in distress, Yūichirō ignores orders and rushes to rescue her, despite being warned that he is just being lured into a trap.

After successfully clearing a vampire nest and rescuing the humans held captive, Yūichirō's party sets for the human base in Shinjuku, unaware that the vampires are attacking there. Upon arriving, they come across one of the vampire nobles, and find themselves at mercy of his overwhelming power.

Yūichirō and his companions arrive at Shinjuku to help repel the vampire offensive, while Guren's party spots Mikaela and Ferid, and decides to face them.

Shinoa spars against Guren before visiting Yu in the library. She tells him about turning humans into vampires. Then, Kureto Hiragi summons Yu to ask him about a vampire spy while torturing Kimizuki and Yoichi to make him tell the truth. Afterward, Yu asks Guren about it and asks if Mika would also be useful to him. In Sanguinem, Mika starves for blood and Ferid recommends halting his growth there. A child offers his blood to Ferid, and Ferid tempts Mika to drink the boy's blood but Mika refuses. Ferid then invites Mika to the Progenitor Council meeting.

The Shinoa squad re-learns the hard cold fact that it's very possible to lose comrades, but there's no time to mourn. They must move on to go rescue the hostages. Right after their departure, Mika and the other vampires arrive to Nagoya as well.