Lin Nian, a modern academic master, is bound to the "Cannon Fodder Counterattack System" and travels through different time and space, replacing the cannon fodder who had a miserable fate in the original work. She has only one goal: to build a career, slap the villain in the face, and have a sweet love by the way.
· Heroine (Lin Nian): a 22-year-old top student in the history department of a prestigious school. Calm and rational, but occasionally confused. He is good at using historical knowledge to reduce dimensionality and attack, and believes that "knowledge changes destiny".
· Protagonist: Partner in the development department. There is no fixed identity, it is a mysterious soul that has lost its memory and traveled with Lin Nian. In each life, she grew up with her in different identities (such as a loyal dog guard, a cold academic master, and a yandere prince), and the two of them redeemed each other.
