Ayu, a genius math boy in the top class, wins competitions all the year round and is recommended to Beijing University. He is aloof and taciturn, but he is fond of the first-year student in the all-around grade.
Secret crush in the senior year of high school, post-it notes on test papers, looking at each other at the window, Ye Qing's jealousy and instigating misunderstandings, regrets about being in a different place for the college entrance examination, parents trying their best to help each other, studying together in a foreign country, and hugging each other under the sunset tree.
The young man's heart beats for a whole summer, and finally the two sides are happy.