Your Mask Is Falling Off, Your Majesty summary:

Gou persuades, Su Lili, the girl who unfortunately time-travelled to become a useless princess, and wants to marry the world’s most terrifying mad emperor – Yi QiYaun, in place of her sister! She was planning to escape the marriage before she got on the sedan chair, but she finally rolled into the palace and ran away with Xiao Bailian! ! The world is so big, she is going to a place where the crazy Yi QiYaun will never find her!