The Emperor's Rewind Queen

Transmigrator Lira Sutton becomes an imperial concubine and unlocks an ability to 'rewind' time. Framed, she uses her rewind ability to turn tables. Emperor Caspian Pierce notices her rewind ability and falls for her. His memory is unaffected by the rewinds. Lira defeats villains and resolves palace crises with her ability. From suspicion, they become inseparable. Lira helps Caspian Pierce eliminate corrupt officials, pacify borders, and secure the throne, writing a sweet legend.