Song Qiege, a 17-year-old girl about to enter her second year of high school, runs into Gu Qiexing while traveling during summer vacation. He is in the middle of breaking up with his girlfriend, and her beloved guitar, which has been with her for years, meets its end at his hands. When school starts, she discovers that the man who damaged her guitar is her politics teacher, and that he lives right across from her. From then on, the two are bound together by an unbreakable connection. During the time they spend together, Song Qiege and Gu Qiexing are both teacher and friend to each other. After the end-of-year exams, Gu Qiexing leaves the high school Song Qiege attends... Four years pass in the blink of an eye. When they meet again, Gu Qiexing is still her teacher, and Song Qiege is still his student. The feelings that had been obscured by uncertainty all those years ago finally come to light...
Song Qiege: Teacher Gu, I want to date you!
Teacher Gu: I'm old. At my age, I don't plan on dating.
Song Qiege: Then should I leave?
Teacher Gu: Let's skip dating and get straight to marriage.
One day, Teacher Gu gets a confession from a fan on a public forum. His usually sweet-natured student transforms into a fearsome wife: Back off! Nobody is allowed to touch my Teacher Gu!
