Part1. How humble can you be if you like someone? Maybe it's like Xia Tian, who only dares to follow him from a distance and never dares to look at his face, even if he doesn't recognize himself. Even later, when Xu Kaimo listened to the song written by Xia Tian and received the gift from Xia Tian, Xia Tian still did not dare to reveal who he was. What Xia Tian didn't expect was that she thought she would disappear automatically. She thought she would never have any communication with Xu Kaimo again, but in the end, because of a cat, she not only met Xu Kaimo, but also kept in touch with him from time to time. Part 2. "Classmate, thank you for your song. I will always remember you. It's just that I'm really not a person worth paying for. I'm not suitable for falling in love. I only have a cat. You should focus on the people around you, thank you." This is what Xu Kaimo originally said to Xia Tian. Xu Kaimo felt that he no longer knew how to communicate with girls. After experiencing love but not being able to do so, he became more open-minded. Part3. As graduation day approached, Xu Kaimo finally realized that he liked Xia Tian, but he couldn't say it. "I like you" seemed to be on a different planet than him. As for Xia Tian, she felt that she couldn't poke this piece of wood no matter what. So, she went to Japan with this feeling. But she didn't know that on the day she left Xianyang Airport after saying goodbye to Xu Kaimo, Xu Kaimo went to Daxingshan Temple alone and wrote "Summer is here, but summer is gone" on the prayer card.