As a novice level Monster Tamer, Yuji would normally be one of the last ones chosen when putting together a dungeon delving party. However, thanks to a clever trick involving a bunch of slimes, Yuji has also absorbed the archived knowledge of a great Sage and secretly gained an incredibly powerful second class! And if that's not enough, he's actually from a place called Japan in another world, which adds even more tricks up his sleeve! But even with these abilities and the help of his slimes, a magical Proud Wolf, and a forest spirit named Dryad, will that be enough to face off against rock dragons, sinister cults and gangs of slavers? Yuji had better hope so, because fate and fortune seem determined to put him into the most ridiculously dangerous situations as often as possible in MY ISEKAI LIFE!