A junior girl in college English department tried to cheat in an exam and was caught by a "lovely" young teacher, Mu. Since then, the two have forged an "indissoluble bond." First, Mr. Mu came to be a substitute teacher for Russian elective courses, and was called to make up lessons, which made her hate again. However, I gradually found that Mr. Mu is a very attractive and meaningful teacher ... Since then, Xue has slowly cultivated his secret love in his heart. In an ancient poem, it is "there are trees on the mountain, but there are branches on the wood, so I don't know."

It was not until Xue Tong graduated that he learned some stories about his work and family, and learned more about each other's past and future. At this time, he had to pick out the obscure secret love, and the two of them came together happily.