share time: 2026-02-01 12:31:52
Modern female SWAT officer Su Xiao travels back in time to become Su Wan, the "hidden sister-in-law" of the Zhenguo Duke's Mansion—younger sister of the Duke's wife, who grew up practicing immortality on a mountain. Upon descending, she catches her ex-brother-in-law Lu Jingchen (the Duke's heir) breaking off his engagement and humiliating her sister. Su Wan immediately uses her immortality skills to snatch back the divorce letter and heal her sister's heartache, unexpectedly activating the "Hardcore Sister-in-Law System"—mission: "Tame the foolish ex-husband and protect her sister's happiness!" But Lu Jingchen's divorce was to shield his sister-in-law from court persecution, and Su Wan's identity as an immortal cultivator hides a past grudge of the Zhenguo Duke's Mansion. When the hardcore sister-in-law meets the "fake foolish" ex-husband, will she beat him up before falling in love, or sweeten the romance while bickering?
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