No one can be frivolous at a young age, but all happiness comes with a price. Love is originally a happy thing for Lin Siyi. Ni Xianglian gave her a different feeling. Sang Chengfeng is not a third party. He appears in her world before anyone else, but in the end he is just a bystander. Is love destined to be sad, or is it a new beginning? Summer is a beautiful time for youth on campus, but will the following years continue to be so happy?