Jiang Tong and Yu Jin were rivals in love and mortal enemies in high school. Both of them being first in their departments. Jiang Tong fell in love with Yu Jin at first sight and tried to be close to Yu Jin. However, a love letter from Yu Jin ended Jiang Tong's secret love. In college, Jiang Tong decided to keep a distance from Yu Jin, but Yu Jin suddenly began to take the initiative to approach Jiang Tong. Jiang Tong gradually realized that Yu Jin might have the same feelings for him.