Chords of the Usurper's Fall

I was just tying my kickboxing hand wraps on a mundane Tuesday morning when a dimensional rift swallowed me mid-punch. I was supposed to transmigrate as a gentle saintess to heal a tragic world, but a glitch swapped my soul with the empire’s deadliest double agent. Now I’m trapped in a brutal fantasy conservatory, armed with lethal shadow-skills, a fake identity, and a raging temper. My target? Davri, the gentle, brilliant musician who was violently blinded and imprisoned after the cruel Crown Prince stole his magnum opus. I don't have soft magic to soothe his trauma, but I have stolen imperial combat manuals and forbidden acoustic assassination arts. If the royals want to steal his music, I’m going to teach this broken genius how to play chords that shatter castle walls and rupture lungs. As Davri's destructive power violently eclipses his oppressors and his devotion to me turns into a fierce, unwavering obsession, the real assassin is running around in my original saintess vessel, plotting our demise. Can I turn a discarded maestro into a god and overthrow the usurpers before my stolen identity gets us both executed?