On the rooftop when he was eighteen years old, Shen Nian had three secrets.
One is Zhou Yu, a cold-blooded academic who always "happens" to pass by her when she is on duty and puts love letters in her physics homework. His love is like still water, but he chooses to go abroad before she opens her mouth.
One is Lu Ye, a handsome young man who always grabs her chicken legs and expresses his love to her after winning a basketball game - his love is like a midsummer rainstorm, but he breaks up with her because of a misunderstanding.
There is also the gentle young man Lin Shen who always sits at the table behind her and silently writes down all her preferences - his company is like the afternoon sun, so warm that people ignore its existence.
But Shen Nian didn't choose anyone. Because her diary was filled with the fourth name - the boy who disappeared on the rooftop three years ago.
When three suitors work at the same time, love letters, piano music, and basketball game confessions take turns, and the whole school is betting on whose hand she will hold in the end. But when the graduation bell rang, Shen Nian stood on the empty rooftop and said softly: "You all came well, but what I want most is the person who turned around and left first on that monsoon day."
This is a story about "surrounded by love but just want to get back to the original heartbeat". When everyone taught her how to be loved, she chose to learn how to love.