Before he is reborn, Shang Junyan sees Su Xinyi as vile and shameless, sinister and deceitful, cruel and ruthless. He dreams of divorcing her.
After he is reborn, Shang Junyan sees Su Xinyi as beautiful and kind, open and upright, and devoted to the greater good. He dreams of marrying her.
Before she is reborn, Su Xinyi sees Shang Junyan as kind and generous, steady and reliable, a true gentleman, and a suitable husband.
After she is reborn, Su Xinyi sees Shang Junyan as petty, pretentious, and a two-faced villain. She would rather die than marry him.
In her previous life, Su Xinyi had a hard time of it. She went from a country girl in a remote village to the only daughter of the Fourth Branch of the Duke of Qi's household in the capital. She lived in constant fear, always treading carefully. The other three branches coveted the Fourth Branch's property and saw her, newly returned to the family, as a thorn in their side, wishing they could get rid of her.
After she married, her husband despised her and her mother-in-law disliked her. They even forced her to die so her husband could marry a noblewoman. Su Xinyi set fire to the Prince of Pingjing's residence. If she was going to die, they could all die together.
After being reborn, Su Xinyi fears nothing. First, she ruins her own marriage prospects. Then she dutifully honors her stepmother, making sure she lives to a hundred. Finally, she repays the Crown Prince for helping her in her previous life, praising him to everyone as a kind, benevolent man who helps those in need.
The very good Crown Prince: "I hear someone is going around telling everyone I'm a good person."
After being praised into the role, the Crown Prince discovers that the little woman who sings his praises is meeting other men for marriage prospects. What a little liar!
His heart, black through and through, gradually warms to the world because of one person.
Much later, the little liar marries the Crown Prince she praised so much that he became the part, and her scummy ex-husband ends up serving as the Crown Prince's lackey.