[Male lead's perspective]
Pei Yan has always believed that if it weren't for the betrothal arranged when they were infants, he would never have married Yun Fu.
Yun Fu is spoiled, capricious, and impossible to reason with.
When she's clingy, she's domineering and controlling, sticking to him all day and regulating every part of his life, so that he can't even have a maid by his side. But when she turns cold, she's truly merciless.
He fought bloody battles and risked his life to ascend the throne, giving her the position of empress, yet she had an affair with another man and let the whole world know that the emperor had been cuckolded.
Growing old together only makes me resent you. Childhood sweethearts have become bitter enemies.
Seven years after Yun Fu was deposed, she died of illness at Yuntai Palace.
Three years later, Pei Yan falls ill from overwork. As his end approaches, he often thinks of Yun Fu, but not of the cuckold's horns she gave him or her past tyranny. Instead, he remembers when they were children, innocent and carefree together. Beneath the bright flowering trees, a little girl holds a peach blossom and calls to him with a smile: "Brother Yan."
Pure, innocent, lively, and adorable.
As he nears death, Pei Yan thinks that he shouldn't have married Yun Fu. If she had been his younger sister instead of his wife, they might not have ended in resentment.
Reborn in his youth, Pei Yan decides to break off his engagement to Yun Fu and take her as his sworn younger sister, so they won't repeat the past.
But before he can be the first to bring it up, Yun Fu has already sent him a letter ending their engagement.
[Female lead's perspective]
Reborn in her youth, Yun Fu looks back on her tangled relationship with Pei Yan in her past life and finds it unbearable.
She's had enough. She's tired of it. With so many men in the world, why settle for just one? She turns her gaze to the fine young men of the capital, and the first thing she does after being reborn is send Pei Yan a letter ending their engagement.
[The straight male lead's wife-chasing crematorium]
Note:
1. Both leads are reborn.
2. In both his past and present lives, the male lead only has eyes for the female lead. In his past life, he was a career man who devoted himself to building his empire and didn't understand love. In this life, he gradually awakens to his feelings.
3. In his past life, the male lead was an ordinary emperor in a feudal society, with a real throne to inherit. After years of marriage to the female lead as her only husband and wife, without having children, he took concubines. In this life, he is completely faithful to the female lead and remains chaste for her.
4. The female lead's affair in her past life was real. While she was empress and after she was deposed, she had secret relationships with other men and slept with them again and again. In this life, she also has romantic relationships with multiple men.
Theme: Cherish your relationships and support one another.