Our Last Crusade or the Rise of a New World, Vol. 5 (light novel)

Two sisters with two distinctly different goals: Sisbell would do anything to get Iska to join her side, while Aliceliese sees him as a worthy opponent, regardless of their duties and convictions. As part of his agreement with Sisbell, Iska has accepted his fate to serve as her guard in Nebulis. When Alice catches them linking arms...her heart practically leaps out of her chest.