Senior high school girl Su Mian has steadily ranked second in her grade for years, while seatmate Gu Xueqing consistently scores 3 points higher than her every time. Everyone assumes Gu Xueqing is a gifted genius and Su Mian is merely a hardworking ordinary person. Through problem-solving details, Su Mian senses something strange, and multiple tests verify that Gu Xueqing owns a score-stealing system bound to herself. The system rules dictate that the host is forever 3 points higher than the bound target, and it cannot be unbound or switched. Su Mian stops being passively patient, intentionally handing in a blank exam paper and writing only a small number of questions, using the system's rules to backfire on the other person, causing Gu Xueqing's grades to experience a cliff-like collapse and suffer endless questioning and mockery from others.