I Fell for the Jealous Tsundere from the Assassin Organization Again

[Two male leads, both chaste, shameless transmigrator, jealous villain, fake death, falling hard] [Flirtatious, smooth-talking, shameless bottom who knows how to read the room + tsundere, jealous top from an assassination organization] To survive after transmigrating into a book, Sang Nan decides to change the villain and save him. He focuses on winning the villain over, determined not to lose out. After relentlessly pursuing him, Sang Nan thinks he has finally softened the villain's heart. He begins to depend on him without a care, his heart and eyes filled with nothing but the villain. But he never expected that, at his adoptive father's command, the villain would kill him without hesitation and throw him off a sheer cliff. Saved by a reclusive master in a twist of fate, Sang Nan decides to stay away from the villain and cherish his life. When the villain finally finds him, he pins Sang Nan against a wall, forcing him to look at him as he punishes him mercilessly.