Reborn at the Temple: My Pact With the Black Dragon

"Poisoned to death by her own husband and his wet nurse's daughter, Selena, daughter of the Duke of Silvermoon, is reborn on the exact day of her wedding. With a sweet smile, she swaps their ceremonial wine cups, tricking the Third Prince into swallowing a sterility curse. She publicly dumps him on the spot and pivots to marry Cassius—the terrifying Commander of the Shadow Legion who has the empire's military in a chokehold. Everyone mocks her for being an absolute fool, but what they don't know is...

she's already died once. And that man who just spent three hundred years waiting for her? He's a literal dragon."