From the Start, I Marry the Demon Cult Leader as My Official Wife

After his father is murdered, Xiao Aotian and his mother are cast aside by their family. His brother runs away from his wedding, and Xiao Aotian is dragged in to fill the gap as a last-minute groom. It was supposed to be an act, but it becomes real, and he marries a beautiful, virtuous wife. One day, a group of black-clad demonic figures storms into his home. “Brother-in-law, please save our Sect Leader!” “Your Sect Leader? I don't know who that is.” “Our Sect Leader is your wife, Lin Yu!” “What? My wife is the leader of the Demon Sect? Where is she?” “She was captured by the Seven Swords Alliance. They're going to sacrifice her to raise their banner.” “Damn it, no more pretending. I'm the mysterious Sword Saint! Touch my wife, and I'll cut you all down!”