When the second year of high school begins, the heroine Lin Xi, who has excellent academic performance but is rational and slightly alienated due to family problems, meets Gu Ran, the newly transferred male protagonist who is a top student. Gu Ran has a bright and handsome appearance and is gentle with others. He is a popular figure on campus. However, he was deeply impressed by Lin Xi's problem-solving ideas during a mathematics competition and took the initiative to approach Lin Xi and become a study partner.
The two began as confidants who admired each other, studied and participated in competitions together, and quietly fell in love during countless days and nights of fighting side by side. During the process, a girl who admired Gu Ran tried to intervene, but Lin Xi was sharp-minded, calm and confident, and could always see through "Green Tea"'s thoughts at a glance, and cleverly resolved them with her magnanimity and wisdom, never doubting or bothering her. Gu Ran also always stood firmly on Lin Xi's side, giving her the greatest respect and support.