Aki Hagi, a low-key adventurer, returns home from the dungeon in Sapporo's 'Chikaho' to find that his garage has turned into a dungeon. He discovers a stone-like slab at the entrance of the dungeon. Could this be a Skill Board? Aki uses the Skill Board to enter the dungeon, determined to become a prominent figure by mastering the board. However, he ends up as a suspicious person wearing a mask and carrying potatoes! Will he be able to conquer the dungeon as a 'normal' person?