Max-Level Expert Reborn as a Green Tea Female Lead

A gorgeous, seductive villainess is transported into a school Mary Sue novel as a brainless, scheming female side character. [All you have to do is complete the tasks I assign you as the female side character and advance the romance between the leads. Be wicked when you need to be wicked, and exit the story when it's time. Easy, right?] She gave an openly malicious smile. "Don't worry. I'm very good at playing with the protagonists." [Our mission is to move the plot forward, not to play the leads to death!] The beautiful woman's smile faded. "...Of course. Why would you think that about me?" The System screamed inwardly: ...Y-you hesitated just now, didn't you!!!! Aah! Villains are terrifying! Hurry and call back all the white lotuses, scheming green teas, and dark moonlights from the Female Side Character Department. I don't want to work with this awful woman!! [Mission One: The female side character reaps what she sows and is shunned and ostracized by her classmates!] The next day, after being locked in the school office, Wen Ruanyue cornered the culprit in a dark alley. With an exasperated look, she said, "You think this petty little stunt is impressive? What kind of gang are you with? You should ask around before you come out here..." The System panicked: Forget it, forget it, sis, let's let this one go for now! The little villains in school novels are amateurs. The heroine will stand up for you tomorrow. Just put up with it for now. Let's endure this a little longer! [Mission Two: Mock the villain and plant the seeds of twisted hatred in his heart!] Wen Ruanyue swept Lu Pei's bowl of food off the table and looked down at him as if he were a lowly creature. "Even dogs wouldn't eat this rubbish, but you're gobbling it up. Are you that eager to come work as a guard dog at my house?" The System was horrified: That's too much, sis! We went too far! The villain's eyes are terrifying. Let's get out of here and lie low for a while. The female side character can't get written out this early! After many rounds of adjustment, just when the System thought everything was going smoothly, the plot started to take a strange turn. Especially the villain, Lu Pei. [She wants me to be her dog. She has feelings for me!] Theme: Good people are rewarded.