In this manga adaptation of the popular web novel series, an overworked wage slave finds himself transported to a fantasy world where he quickly becomes the strongest sage in the world... thanks to the help of an army of tamed slimes! Yuji travels to a town known for its monster-enhancing armor, Boginia. Yuji, the slimes, and Proud Wolf end up currying the favor of the staunch old proprietor of the best shop in town. In order to obtain the items to craft the monster armor, Yuji must go out and hunt the dragons dwelling in a volcano. As new types of slimes join his crew, an even more powerful dragon shows up...?!