I’ll Be the Male Leads Sister-in-Law Novel

Mu Mingtang lives as a substitute fiancée, adopted by the Jiang family and engaged to the Prince of Jin. Aware she's merely a stand-in for his true love, she suppresses her individuality, mimicking the Prince's first love to secure her position. Her carefully constructed life shatters when the genuine Miss Jiang returns, reborn and determined to reclaim her engagement and identity. To appease his first love, the Prince of Jin discards Mu Mingtang, presenting her to the supposedly deranged Prince of Qiyang as a disposable pawn. She vows revenge, intending to become the Prince of Qiyang's wife and force the Prince of Jin to acknowledge her as sister-in-law. Unexpectedly, the Prince of Qiyang, a once formidable God of War, awakens. Formerly cruel, his descent into madness led to him being sidelined. Upon his revival, he finds Mu Mingtang by his side and, motivated by her, reclaims his power, the throne, and unites the world, his ambition now fueled by her.