As a result of a magic circle that Aqua had drawn in Keele's dungeon, strange explosive doll monsters have started to appear, putting the town at risk.
Wanting to earn some real money, Kazuma and Aqua go to explore a newly discovered pathway in Keele's Dungeon, coming across gremlins, mimics, and the undead along the way.
After witnessing Aqua warp the town's citizens with her petty confessional hearings, Kazuma takes a dip in the mixed bath, where he comes across another man who is as sick of the town's behavior as he is.
Vanir gives Kazuma the choice of either selling the intellectual rights for his real world products for a one-off payment of 300 million eris, or maintaining a profit-sharing contract of 1 million eris a month.