Rude is an adventurer who makes a living by collecting medicinal herbs in dungeons filled with miasma, relying on his unique skill of “abnormal status nullification.” Because of this, other adventurers avoid him because he smells like miasma, and he cannot form a party, so he is derided as a “miasma diver.” Then, a new labyrinth is discovered, and Rude is invited to join a party that needs him as a baggage carrier. In order to change the situation, he challenges the labyrinth. However, after encountering a powerful monster in the labyrinth, the adventurers who accompanied him betray Rude and are abandoned as a decoy… After a life-or-death battle with the monster, he is injured, loses all his supplies, and is in a desperate situation. With the monster’s corpse lying before him, Rude tries to survive by gambling on the forbidden “monster food”… The more he eats, the stronger he becomes. This is the start of an exciting gourmet adventure fantasy!