Though I Am an Inept Villainess

When His Highness's prized butterfly, Reirin, wins the prince's heart, a resentful court rat named Keigetsu wields forbidden magic to swap their bodies—and their fates. With a death sentence looming, Reirin inhabits her new, healthier form, while Keigetsu discovers that Reirin's life is far more complicated than it seems, drawn into a perilous inner-court conspiracy.