The Sickly Prince and His Poisonous, Cunning Match

One moment of carelessness, and her opponent drugged her and left her to drown. Rong Li, acclaimed as the No. 1 agent, transmigrated and somehow found herself mistaken for the sentimental and melancholy Fifth Miss of the Shen family! So be it, Shen Qingyao. A name is just a code name, after all. But before she could finish complaining about the original owner's Lin Daiyu-like persona, the Shen family, afraid for their own lives, bundled her into a bridal sedan to marry into Prince Wu's household! Fine, she could get married. Once the numbness wore off, she could still slip away without a trace. But reality cruelly brought tears to her eyes! Can someone explain what is wrong with this man, who looks every bit the gentle, refined gentleman but has a wildly unpredictable personality?!