In this manga adaptation of the farcical fantasy light novels, a hapless young lad tries to find love and fortune alike in the gigantic, monster-ridden dungeons beneath the city of Orario. During the frenzied festival, Bell and Hestia find themselves in a tight spot thanks to the scheming of a shadowy someone working behind the scenes. When the hijinks turn dangerous, will Bell manage to summon the strength to protect those he cares about? And who's doing all this scheming, anyway?