Welcome to the City of Labyrinths, where the basis of the economy is a multi-story underground dungeon. There, countless adventurers take on traps and monsters for expensive trophies. Of course, everything an adventurer could need is always available: blacksmiths, apothecaries, inns, taverns, temples—and, naturally, magical shops. One of those shops is where the story’s main character, Fujiwara, works. Although his shop is called an antiques store, for a modest fee he’s always ready to identify all the magical properties of any item found in the dungeon. The young man is a bit lazy, often doesn’t get enough sleep, and drinks liters of coffee, but he truly loves his work and has knowledge that’s outstanding even for his age—so adventurers value him highly. They often bring him the most varied items for appraisal and are always happy to share stories from their adventures…