Love Between Twins

Wu Yi and Wu Fei were cousins ​​of the same age. One had a tough life and the other was precious. Because of the unintentional words of his second mother, Lian Tianxue, Wu Yi was asked by the Queen Mother to marry the sick prince Shen Tianyu. Wu Fei was deeply dissatisfied with the marriage, so she pretended to be Wu Yi and married into the palace. After Wu Yi learned the truth, he concealed his identity and sneaked into the palace, but was taken back to the palace by the emperor. After that, the two sisters exchanged identities, one was in the harem, and the other was the fake princess. When their identities are revealed, how should the sisters face their feelings?