After the Substitute Marriage, I Became the Favorite of the Sickly Regent.

The ancient dynasty was emptied out, the imperial power declined, and the regent Xiao Yi took control of the political power. Due to the shadow of his childhood, his character became yandere and paranoid. Su Yao, the eldest daughter of the Shangshu Mansion, was supposed to marry the third prince, but was framed by her concubine Su Wan and was forced to marry instead.