Suami Lemah, Istri Kuat?

Xavier wakes as a useless prodigal in a novel. On his and cousin Michael's wedding day, his fiancée cheated on him with Michael. While the Main Branch forces him to swallow the insult, he activates the Prodigal Redemption System, rebels, and slaps his enemies. But Michael's bride, who's also cheated on, stays calm. What's her secret?