Digging Up My Junior Sister's Immortal Bones at the Start of the Game—has That Made Me the Main Villain?

[Villain + System + Chosen One + Senior Brother + Lighthearted + Satisfying Read] [Ding! Detected that the host is digging out the immortal bone that accompanies the destined heroine! The Destined Villain System has been successfully bound!] Mo Tianxiao: "Destined Villain? Me?" Looking at the gleaming immortal bone in his hand and the beautiful woman lying on the bed, Mo Tianxiao was somewhat confused. How did he, a law-abiding citizen, become a villain? Mo Tianxiao: "Fine, villain it is then. With the system, even the Chosen One isn't invincible." [Ding! Detected that there are 18,653 Chosen Ones in this world. Please seize the destiny of all the protagonists and become the true Destined Villain!] Mo Tianxiao: "Seize the destiny?? What kind of bullshit villain is this? I'm a perfectly law-abiding citizen!" Protagonist: Mo Tianxiao