The Charismatic Senior Brother Gets Played by a Scheming Villainess

[Dual Male Leads, Senior and Junior Disciples, Transmigrate into a Book, Sweet Romance and Nurturing] Reborn, Scheming, Tea-Spilling Villainous Junior Disciple X Transmigrated-into-a-Book, Irresistible Senior Brother Shen Xingyan transmigrates into a book as the cannon-fodder senior brother of a deranged villain. To protect both himself and his junior brother, he teaches the villain right from wrong and good from bad, and dotes on him endlessly, giving him anything he wants. He thinks that if things keep going this way, his junior brother will avoid repeating the mistakes of the book, live a peaceful life, and allow him to keep his own life. Then the cultivation world falls into turmoil, and the former villain strides through the air, leaving a trail of cultivators' corpses, until he reaches Shen Xingyan. Shen Xingyan: ... Why did nobody tell him that once a villain gets strong enough, he can open the door to a whole new world! Corpses pile up across the cultivation world, and the villain's teasing gaze is full of amusement. He says, “Senior Brother, since you treat him so well, why not treat me as if I were him?” Shen Xingyan: Thanks, but I'm not interested in a substitute.