Moon Lovers: Scarlet Heart Ryeo (2016)

A modern woman gets transported back to the Goryeo Dynasty, finding herself in the body of a young lady amidst royal princes. She becomes entangled in the princes' struggle for power and love, complicating her quest to return home. This historical K-drama weaves intricate relationships with dramatic flair. A must-watch for its breathtaking visuals, compelling story, and heart-wrenching romance that will keep you hooked till the very end.