Yuichiro, Shinoa, Kimizuki, and Yoichi meet Mitsuba Sangu and form a squad lead by Shinoa. They leave the walls of the Japanese Imperial Demon Army to exterminate vampires. In the meantime, Guren takes a separate route.

After saving the captured people from vampires, Yu and his unit reach Shinjuku. However, by the time they reach there, the war had already begun and some vampires had gotten through. To prevent Shijuku from falling, they must fight off the vampires.