Is It Wrong to Try to Pick Up Girls in a Dungeon? on the Side: Sword Oratoria, Vol. 22 (Manga)

"While Bell's clash with Aiz may have finally borne fruit, Aiz still can't accept his ideals, as to her, the very existence of monsters is a plague on humanity. She turns her blade against him once more, but this time, Wiene comes to his rescue! Aiz's foe is right in front of her, yet she finds her resolve wavering--could she have something in common with the beasts she wants to exterminate?" --from page [4] of cover.