Black Market Dungeon ~Ese potions de Onna Boukensha o Kuimononisuru Akutoku Gyoushonin~ (RJ01251245)

A vast labyrinth-like structure has been discovered beneath certain ruins. However, it is no ordinary ruin.
Treasures lie dormant and ferocious monsters thrive.
The world has changed rapidly.
Rare treasures and unknown materials obtained from monsters.
Research into powerful weapons, tools, and magic has advanced, and individuals and countries alike continue to take on new challenges, openly displaying their ambitions.
Towns and villages around the dungeon have also begun to prosper, and many people dream of making a fortune.
Inns, tool shops, and blacksmiths are especially valued, and with enough effort, they can grow as big as you want.
In a corner of this world, a grinning man appears before the dungeon…