Shen Yusheng transmigrates into the body of the useless legitimate daughter of the Prime Minister in the Great Liang Dynasty and is betrothed to Xiao Heng, the cold-faced Prince Regent. She only wants to take life easy, but unexpectedly, from the moment of their betrothal, Xiao Heng can hear every one of her inner thoughts. Although she appears graceful and gentle on the outside, her mind is constantly full of sarcastic remarks, and she never hesitates to praise his good looks either. He silently indulges her and secretly protects her from harm. After they are ambushed and fall off a cliff, he finally reveals his past to her in a cave. The first time he saw her during the Lantern Festival became the first ray of light in his seventeen years of darkness. He spent three years becoming Prince Regent, all to make himself worthy of her. "I transmigrated into the body of a useless young lady and was supposed to marry a living demon. But now this demon secretly listens to my complaints every day and looks utterly smitten while doing so. Is there something seriously wrong with this generation of Prince Regents?"