Shangqiu No. 1 High School is the best senior high school in Shangqiu City. Every year, it sends a large number of students to 211 and 985 universities, as well as world-class universities. Even its least successful students get into a top-tier university. In other words, setting foot in this school means taking the first step through the doors of a great university. Everyone knows Shangqiu No. 1 High School is the best high school in Henan Province. What they don't know is that, beneath its public-school identity, it goes by another name: Central Bureau National Security Operations Department, Division One.
“Brother Ranran, Xixi... Xixi won't have a dad anymore.” Nian Xi stepped forward and wrapped her arms around his neck, resting her chin on his shoulder as she sobbed in despair.
Gu Zheran held the trembling little girl in his arms. “Don't be afraid, don't be afraid. I'm here, and I'll always be here. I'll protect you from now on.”
Nian Xi's face was streaked with tears. “Gu Zheran, you liar!”
The next time Nian Xi saw him was in her second year of middle school. Gu Zheran had been injured on a mission and lost his memory. He didn't remember her. Heaven always seemed to play cruel tricks: he remembered everyone else, but her alone was gone from his mind. She heard from her brother that Gu Zheran would be teaching at Shangqiu No. 1 High School. Fine. If he didn't remember her, she'd make him remember. Shangqiu No. 1? Just wait.
Gu Zheran was assigned to teach physical education to Class 25, Grade 10. During his first lesson, he noticed one student was missing from the roll call, so he left the gym to look for them. As he reached the girls' dormitory, he spotted Nian Xi just outside, having slipped and landed on the steps. And so the story begins...
The person the heroine likes has lost his memory?