Toji， a regular guy who got swept up into someone else's summoning circle， has been living comfortably in another world thanks to his overpowered manufacturing skills and band of charming summon monsters. One day， he stumbled upon a mysterious dungeon and decided to go spelunking. But， it was all downhill from there! Now an overbearing yet miniscule girl has him going every which way， and a battle against the ultimate guardian awaits him in the deepest chamber!?
