Our Last Crusade or the Rise of a New World Novel Volume 9 was written by Kei Sazane with illustrations by Ao Nekonabe.

In their scheme to overthrow the government, Hydra abducts Third Princess Sisbell and spirits her away to the Empire. To rescue her, Rin takes it upon herself to tail Iska and company from the shadows and stage an infiltration! Little does she know that chaos brews in the land of witches…

Our Last Crusade or the Rise of a New World Novel Volume 10 was written by Kei Sazane with illustrations by Ao Nekonabe.

Just as Iska and Unit 907 finally rescue Princess Sisbell, the Lord Yunmelngen abducts Rin and orders them back to the Imperial capital. Despite the obvious danger, Iska and company hurry to the heart of the Empire to both free their comrade and discover what transpired there a century ago during the creation of witches. But neither of these tasks will be easy, for the Eight Great Apostles are determined to end Iska’s pursuit of the truth. Meanwhile, disaster brews in the Nebulis Sovereignty!

Our Last Crusade or the Rise of a New World Novel Volume 11 was written by Kei Sazane with illustrations by Ao Nekonabe.

Iska and Unit 907 have defeated one of the Eight Great Apostles, Luclezeus, and arrived at the Imperial capital. There they meet Lord Yunmelngen, who asks Sisbell to use her astral power to help uncover the truth behind the tragedy that transpired a hundred years ago. At long last, the mystery behind the birth of the Founder Nebulis, of Lord Yunmelngen, and of the Black Steel Gladiator, Crossweil is revealed!

Our Last Crusade or the Rise of a New World Novel Volume 12 was written by Kei Sazane with illustrations by Ao Nekonabe.

Alice gives chase to Grand Witch Nebulis and seeks to put a stop to the rampaging founder. She comes across her transformed older sister Elletear who has become their enemy. Now, a united front will stand against Elletear and the traitor Joheim.