After I Transmigrated into a Book, I Stole the Heroine’s Halo

A bucket of cold water later, she transmigrated into the script where she’d only had a bit part. It was bad enough that she couldn’t be the heroine, but she’d been made a fake eunuch, too! So when would she ever get the chance to save her beloved, the man of her dreams, Shen Xiuyu?! Shen Xiuyu: “You think you’re the only one who transmigrated here? How naive!” Before Luo Ran could even snap back, the Book-Traversal System in her head spoke up: “This mission: help the second male lead ascend the throne...” Damn! There’s a System, too? What is going on?!