Eager to obtain the Cursed Gear, Yuichiro tracks down Guren and persuades him to provide him a chance at the Contract Ceremony. Passing Guren's test, Yuichiro, Kimizuki, and Yoichi puts their lives on the line to make a contract with the demon kings.

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.