Isekai fantasy where the protagonist breaks magic
I found this story on the Web several years ago, lost track of it, and can't find it now. It's a kind of different isekai story where, instead of the standard formula of our protagonist being summoned to a magical world and greeted by someone who tells him he's the Chosen One who's needed to face some threat, this guy just ended up in a magical world one day with no idea how he got there or why.
He doesn't have much in the way of skills that would be useful in a medieval-tech-level society, so he has to rely on his wits, and on a unique power he has to break or suppress magic. Unfortunately he's in a civilized, peaceful kingdom where most of the things that that would be useful for are illicit dealings, so he ends up becoming a thief out of necessity.
He figures if it could happen to him it could happen to someone else too, so he tries to get the word out by having bards compose a catchy song about him that he's hidden a bunch of pop culture references in, so anyone from Earth who hears it will know to look for him. I think one of them was about <PERSON> and <PERSON>. 300
Really early on, he finds out it worked, that there's someone else from Earth who was there before him, who doesn't break magic; she's actually a big-shot wizard, but he's never heard of her because she lives way off in another kingdom. He promises her servant who was sent to find him that he'll go visit her when he can get around to it, because for some reason she can't come in person.
He gets caught stealing something from someone powerful, who instead of punishing him twists his arm into taking on a big quest to steal something from a dragon, which he totally thinks is a bad idea but he doesn't have much of a choice. He gets sent along with a companion to keep him in line, a warrior-woman who he totally has the hots for but of course he doesn't want to admit it to her. I think the quest was going to take him close enough to where the wizard lived that he could visit her along the way. And that's about as far as I remember reading.
Any idea what this is? I tried to tag this <PERSON> but the tag doesn't exist here. 247