Engaged to the Villainess at the Start

When Qin Shu awakens in a fantasy world with the Great Villain System, his first mission seems simple: propose to the notorious villainess. But fate has other plans. He discovers her sister is destined to become the story's heroine—and she's about to marry the male lead in her sister's place. Armed with this knowledge and a cunning mind, Qin Shu hatches an audacious scheme that could win him both sisters' hearts. In a world where destiny is written, he's ready to rewrite the script for double the romance and twice the chaos.