They challenged Kidou and the second group to a match to stop them from rescuing Haruna and stopping a ceremony required to release the Demon King after 1,000 years. After being beaten by Kidou's team, they joined forces with Tenkuu no Shito to form Dark Angel. Once Dark Angel was defeated, Sein attempted to vanquish Makai Gundan Z, but after Endou Mamoru stops him, the team retreats behind a stone door where they would remain for another 1,000 years.