I Transmigrated into a Nobody and Became the Male Lead's Sister-in-Law

Mo Xiaoxiao, a well-behaved young woman from a wealthy family, transmigrates into a book, becoming a random passerby in a school romance. The original character in the book was not only a model student but also an academic genius. Luckily, Mo Xiaoxiao is a top student herself. In the original story, the character had no real connection to the male or female lead. She was in the same class as them in high school, but hardly interacted with them. After earning a place at the best university in the country on the college entrance exam, she was praised repeatedly by her classmates and teachers, and was mentioned by the leads when they were chatting. After transmigrating, Mo Xiaoxiao quietly focuses on her studies, just as the original character did. She plans to follow in her footsteps and get into the best university. She never expected to attract a man by accident: Pei Yanci, the male lead's older brother. She never went after the male lead, but somehow ended up winning over his older brother and becoming his sister-in-law. (Dear readers, the heroine won't have much contact with the original male and female leads, and they won't be villainized.)