Cannon Fodder Female Lead’s Online Counterattack

【Rebirth 1v1 Romance + Revenge on s*um + Koi Space】 She was originally the female lead, but ended up as the most tragic supporting character in history! Before her rebirth, she died without knowing that she was the protagonist of a book, nor did she know that a transmigrated supporting female character with a system had taken everything that rightfully belonged to her, leading to the destruction of her family. Reincarnated, she opens her eyes to find herself blessed with incredible fortune and luck, holding the power of a koi in her left hand and a space in her right. She changes her destiny, becomes wealthy, excels in her studies, and transforms into a top student. Along the way, she p...