The Boy Who Rode a Bamboo Horse [Quick Transmigration]

People say childhood sweethearts are destined to marry and remain devoted to each other, but alas, their stories so often end in tragedy. One after another, lovely young women with pure hearts are betrayed by their families or lovers, or forced by circumstances into miserable fates. Pei Yong's task is to help them escape the tragic endings of their previous lives and live happily ever after. 1. The merchant's daughter abandoned by her cousin: Her cousin, to whom she had been betrothed since childhood, passed the imperial examinations and became the son-in-law of a powerful family. Poor Yun Zhaozhao was jilted, and because she had large feet, no one would marry her. She hanged herself in her room. 2. The childhood sweetheart who died for love: The boy next door had always cherished Yun Zhaozhao, and their families had tacitly agreed that the two would make a fine match. But no one expected him to leave for the battlefield and never return, without a word. When Yun learned that her childhood sweetheart had died, she took her own life for love. 3. The older sister sold by her younger brother to pay his debts: She was a perfectly good girl, but her younger brother incurred gambling debts and offended the governor. He sent Yun off in a sedan chair to become the governor's concubine. Unable to bear the humiliation, Yun struck her head against the ground and died in front of the governor's residence, preserving her virtue. 4. The fallen young lady whose family was destroyed... Note: 1. Romance from the male lead's perspective, 1v1, happy ending, both are each other's first love. 2. More worlds will be added when inspiration strikes. 3. The male lead transmigrates into a book, and the female lead is the same person. 4. Tragedy comes not only from lovers and family, but also from the times. Premise: Two childhood friends, never at odds, supporting each other until old age