If Found, Return to Hell By Em X. Liu

Being an intern at One Wizard sounds magical on the page, but in practice mostly means getting yelled at by senior mages and angry clients alike. And so, after receiving a frantic call from a young man who’s awoken to a talisman on his bedroom wall—and no memory of how it got there—Journeyman Wen jumps at the chance to escape call-center duty and actually help someone for once.

But the case ends up being more complicated than Wen could ever have anticipated. The client has been possessed by a demon prince from Hell, and he’s not interested in leaving.