Death March to the Parallel World Rhapsody, Vol. 12 (light novel)

With the demonic threat taken care of, relative peace has returned to theLabyrinth City, allowing the residents to return all focus to the Labyrinthitself. But when the deeper levels of the Labyrinth prove to be more of achallenge than anyone realized, Satou decides it's time for some specialtraining with the Elves!