When he was a child, he suffered from depression and she was an innocent and cute little girl. Their parents were friends, their mothers were best friends, and they were in the same school in high school. He thought he could protect her forever, but another person appeared and she gradually became estranged from him. Finally, he decided to leave. A year later, he returned to this familiar city again. Will she chase him and ask him to play with her as before? His name is Song Shisheng, and her name is Jie Keer. Their story is very exciting...