Death March to the Parallel World Rhapsody, Vol. 14 (light novel)

"A sight for sore eyes! Having toppled another powerful foe, Satou's group heads back to Labyrinth City to celebrate their achievements. Upon returning, they're greeted by two familiar faces--Zena and Karina have come to Celivera! Plans are made to give them a warm welcome, but those get derailed when Zena runs into trouble. Her labyrinth dive takes a turn for the worse when a monster kidnaps her, so Satou rushes to her rescue. Inevitably, he finds much more than he bargained for! It seems a Hero's work is never done"--