The Crown Prince's Substitute Bride

In her previous life, he donated his heart to her, but still couldn't save the girl born with heart disease. After she transmigrates, she takes her twin sister's place and marries a brutal crown prince, only to discover that he looks exactly like her boyfriend from her previous life... Could this marriage truly be fate? As the crown prince of Fengyun, he had never suffered such a humiliating disgrace. A prefect's daughter had actually used an aphrodisiac to get into his bed? His hard-won reputation was ruined in an instant! So you want to be crown princess? Fine, I'll make sure you get your fill! By imperial decree, you'll be my concubine for life!