It tells the story of several teenagers as they grow up, about youth, dreams and travel. In the story, Lu Xiaobei and Cao Ke don't know whether their feelings are between brother and sister, or between a man and a woman. Xiaobei's good friend He Qianxi told Xiaobei that she fell in love with this person who made Xiaobei feel entangled. Out of friendship, Xiaobei innocently told Cao Ke that in fact, she really hoped that Cao Ke would refuse categorically. But Cao Ke agreed without thinking. In fact, Cao Ke just wanted to test Xiaobei's reaction. It's a pity that He Qianxi took this farce seriously. This makes Xia Jingyu, who has had a crush on Xixi for many years, confused. On one side is his brother, and on the other side is the person he likes. At this time, Zheng Haojun, who had disappeared for five years, returned. Thus, this endless emotional entanglement began. Will time allow them to clearly understand what they want? How will the story end?