Death March to the Parallel World Rhapsody, Vol. 23 (novel)

Leaving the Western nations, Satou and his companions visit the Great Forest Labyrinth. In the fortress city of Arcadia, which serves as their base, they encounter an extraordinarily beautiful girl who looks exactly like Lulu. While helping her revitalize her general store, they set out to conquer a new labyrinth… But what challenges await them?