They Chose the Fake. Magic Chose Me.

They gave another girl the place that should have been hers. Twelve years after a fire concealed a switch at birth, the true Blackthorn heiress returns to the family's magic academy, where she is treated like an intruder. Her parents dismiss her, her brother turns against her, and the false heiress enjoys the life built on her disappearance. But rejection cannot erase what runs in her blood. When her sleeping power awakens, the girl they called worthless becomes impossible to ignore—and the family that chose a convenient lie must finally face the daughter they refused to recognize.