Female Lead! Stay Away from Me

Not every sacrificial character deserves to be taken for granted! Not every ex has to come crawling back! Not every scumbag gets what he deserves! Ren Jun just can't understand why Lu Jingxi has become so strange. Sure, he isn't a good person, but other than breaking up with Lu Jingxi, he hasn't done anything to wrong her. He made his own choice, so there's no reason to regret it. But Lu Jingxi, could you stop looking at him like that? And could you stop picking fights with him all the time? In short, Lu Jingxi, stay away from me!!!! This story is also known as "My Ex-Girlfriend Has a Screw Loose, She Needs Help!" "The Cannon Fodder Male Side Character's Comeback" and "A Few Things Between the Cannon Fodder and the Heroine." P.S. 1. The reborn heroine had a miserable life in her previous life and thinks the male lead was responsible. 2. The female supporting character has transmigrated into a book. 3. The male lead is the scumbag ex-boyfriend from a novel the female supporting character read. 4. The reborn heroine is nuts, and the male lead will never take her back. 5. The author probably has a screw loose too. You may not like the heroine and male lead, and that's fine, but please don't insult the author. I'm not thin-skinned, and attacks won't really hurt me, but they will make me unhappy.