How to Tame Your Yandere Villain Brother

She transmigrated into a romance novel as the villain's wicked older sister—and his darkness meter is already at 80%! Su Qianqian's mission: redeem her adorable little brother before he becomes a mass murderer. Day 1: He smiles sweetly. So innocent! Day 2: Sword to her throat, deadly poison down her gullet. Furious, she forces the same poison into his mouth—if they're dying, they're dying together! But why is her dangerous "brother" suddenly acting clingy and possessive? When Su Changyang traps her with obsessive desire, she protests: "I'm your sister!" He smirks while undressing her: "We're n…