Now That I’ve Transmigrated Into a Book and Have a System, Who’d Still Be the Male Lead’s Blood Bag?

After transmigrating into a book, with a System and a royal connection, who would still be a blood bag for some stupid male lead? I can be a supporting character, even a villainess, but I'll never be a lovesick villainess! Qiao Qiyue is an obscure chemistry teacher at a high school in S City. When a student caused trouble during an open class, an experiment exploded and sent her straight into an old-school tragic romance novel as its villainess. She also ended up bound to a System that lets her interact with on-screen comments. At first, she was completely bewildered. Ancient times, livestreams, selling products... What kind of crazy talk was all this? But then she discovered that whenever the System assigned a mission, it would automatically level up. Once it reached Level 3, she could earn double the money by selling products within the drama. So she happily accepted her new life. Since she couldn't go back, she might as well get to work: dump the trashy men, call off the marriage, level up the System, use her chemistry knowledge to save handsome men, make a fortune, and finally help her cousin take the throne and lead the people of Da Liang into a new life. But why does her cousin want to drive her handsome men away? Netizen: “Hey, wait, why is this short drama getting more and more popular?” Netizen B: “Pinduoduo, Red Pear, A Thousand Shades of Red Grandma... Are these really so popular that they've gone viral hundreds of years in the past? Red Persimmon Bookshop!!!!” But why is it so satisfying to watch? Prince Huai Mu Jingcheng is decisive and cold-hearted. But all along, his eyes have followed that rose he doesn't dare touch. His last life ended in tragedy, and love brought him nothing but pain, so he doesn't want to get close to her again. But why is she like a little bee, buzzing around him every day no matter how often he tries to shoo her away? Years later, after Mu Jincheng pins her down, she blushes and protests, “Aren't you my cousin?” Mu Jincheng: “Who said I'm your cousin? Come on, call me your husband!”