Quick Transmigration: The Lucky, Fertile Wife Insists on Being Doted On

Xu Bao'er is an orphan who has been bound to the Childbearing System, tasked with completing the objective of having many children to gain fortune. She is thrown into her first mission world as Xu Bao'er, the concubine-born daughter of the Xu family. On her wedding night, she discovers she is a substitute bride. The original intended bride was her legitimate elder sister, Xu Yu'er, who sought to marry the Crown Prince to become the mother of the nation. To avoid marrying Zhou Jin, the disfavored Duan Wang, Xu Yu'er orchestrated a scheme to swap places, leaving Xu Bao'er to face the wrath of a husband who despises her family.

Zhou Jin is a cold, domineering prince with a tragic past. His mother, Consort Jing, was a former empress who attempted to assassinate the current Emperor and subsequently hanged herself in the Cold Palace. Zhou Jin bears the stigma of being the son of a traitorous consort and has been marginalized by the Emperor. He is known as the Living King of Hell for his ruthless military tactics. Upon learning of the marriage swap, he views Xu Bao'er with utter contempt, believing she is a scheming tool sent by the Emperor to humiliate him. Their wedding night ends in violence, with Zhou Jin treating her roughly and refusing to acknowledge her as his wife publicly.

Despite her precarious position, Xu Bao'er remains calm. She possesses the ability to read minds, a skill granted by the system, which allows her to perceive the true thoughts of those around her. She discovers that Xu Yu'er is already pregnant with the Crown Prince's child through illicit means and is jealous of Xu Bao'er's beauty and luck. Xu Bao'er realizes that her fertile constitution, combined with the events of her wedding night, has likely resulted in a pregnancy. She decides to secure her position by giving birth to the Duan Wang Manor's first heir, which could elevate Zhou Jin's status and make her the Empress.

Xu Bao'er begins to navigate the treacherous palace politics. She encounters Xu Yu'er, who is now the Crown Princess, and uses her mind-reading ability to anticipate and counter her sister's schemes. When Xu Yu'er attempts to send concubines to Zhou Jin's manor to undermine Xu Bao'er, Xu Bao'er claims that Zhou Jin is physically incapable of consummating the marriage, shocking the court and protecting her secret. Meanwhile, Zhou Jin grows increasingly suspicious of Xu Bao'er's boldness and the rumors surrounding her.

During a visit to an underground slave market, Xu Bao'er purchases two fighters: Da Wu, a strong man selling himself to save his mother, and Jing Lie, a mysterious foreign youth with heterochromatic eyes. She restores Da Wu's freedom but keeps Jing Lie, recognizing his potential as an important character in her mission. Her life changes further when Zhou Jin is ordered to suppress the Jiu Lan Mountain bandits. Xu Bao'er disguises herself as a man named Zhang San and follows him, capturing the bandit leader Luo Qiang to gain access to Zhou Jin's inner circle.

As Zhang San, Xu Bao'er interacts with Zhou Jin, who is intrigued by her courage and skill. She delivers longevity noodles on his birthday, a gesture that subtly touches him, though he remains guarded. Zhou Jin begins to suspect that Zhang San and Xu Bao'er are connected. The story follows Xu Bao'er's efforts to win Zhou Jin's heart while managing the political threats from the Empress and Xu Yu'er. She must balance her mission to bear an heir with the growing complexity of her relationship with the cold prince, all while uncovering the secrets behind the imperial family's infertility curse.