Too Many Secret Identities, and the Princess Consort Has Gone on a Killing Spree!

A medical PhD transmigrates into the body of a love-struck ancient-era concubine-born girl, and even takes her older sister's place to marry a sickly prince pretending to be ill, as a good-luck bride? What kind of melodramatic tragedy is this? Su Yu refuses to accept it and instead uses her medical skills to forge her own unconventional path. But what's with all these handsome men, each with a completely different style? A sweet, scheming puppy of a prince, a cold-blooded assassin leader who's kind only to her, and a seemingly honest but actually hypocritical young guard... My heart was set on the bright moon, but there are a few too many moons... Just as Su Yu prepares to lie flat, build her own harem, and enjoy the pleasures of keeping men, she discovers that all these people are secret identities of the same person! The fed-up mistress of the harem draws her flying sword... Sorry, you practice martial arts, but I seem to cultivate immortality!