A letter allows Li Xingxing to travel back to his high school days. This time she decided to give all her love to Song He before Song He knew her in the previous life. But the more I got in touch with him, the more I realized that I didn't seem to understand Song He at all. And when she slowly came into contact with the truth about Song He, she traveled back in time again. She frantically searched for a way to travel through time. This time she must protect Song He.
Concept: time travel