Plunderer manga volume 2 features story and art by Suu Minazuki.

Licht and the gang find themselves face-to-face with the mysterious Demon of the Abyss, only to find that it's unlike any creature they've ever seen. With rapidly rotating wings and a body of metal, this unknown flying object begins to wreak havoc on the town, forcing Licht to summon his powers. In the midst of the chaos, a mysterious figure appears before Licht, and that person is...yet another ace?!