Blade & Bastard Novel Volume 4 was written by Kumo Kagyu with illustrations by So-bin.

Scale's dungeon exists in infamy as a vast maw of unknowable depth, containing monsters and legendary treasure. But the dungeon itself isn't the whole story; after all, what would a place like that be without adventurers willing to delve into it? Trace the dungeon's beginnings with the tale of the free knight Sezmar, who leaves his knightly order and gathers his party to adventure for the first time. Follow the son of a shoemaker, who barely survived an encounter with the red dragon, as he collects a motley band for a dodgy job. Experience Orlaya's first adventure with her new companions after escaping the yoke of her old clan. Stalk the black-clad adventurer Iarumas as he explores alone, silently seeking something. In Scale, there are just as many adventures as there are adventurers, and the dungeon swallows them all.