This book tells the story of a girl who enrolled in the wrong class but met the right person. The two became roommates for a short time, but later separated due to their grades. Later, a chance meeting of eyes triggered those memories of being at the same table. Because their thoughts did not cross the line, the two began to remain silent for three years, just silently paying attention. Until the last physics experiment class in the third year of junior high school, the female protagonist accidentally stepped on the male protagonist's foot. The male protagonist said: Do we still need to say sorry to each other? The window paper of 3 years was pierced. At the last moment, we confirmed each other's feelings, but it was also the time to go our separate ways. There is no QQ number, no mobile phone number, only the turning around and the back view
