Aila (Gu Liya), a senior in the Department of Fine Arts at an art university, is a rare soul in the department. In a debate, Aila led her friends Wu Tingting (Ye Qingqing) and Su Lulu (Wang Zhongxin) to win all the battles and severely hit the rival music department. The three strong teams of the music department, Dalong (Long Fei), Erlong (Long Ze), the second-generation rich passerby Ding (Ding Ting), and the auditors, were unwilling to be defeated by a few yellow-haired girls. They found the talented Kang Lin (Zhu Wenchao) for help... In order to attract Kang Lin's attention, Wu Tingting made an appointment with a few friends to take Kang Lin to KTV together. Wu Tingting designed to frame Kang Lin and asked Kang Lin to pay a high consumption fee. Kang Lin fell into the trap and had to become a bar singer. Aila found Kang Lin, who was a resident singer, hoping to financially support Kang Lin so that Kang Lin could complete his studies well. Unexpectedly, Kang Lin did not appreciate it at all. The two had a dispute... During the eleven-day trip, Kanglin and Ella left the group and came to the Fishing Net Primary School where Kanglin had attended. Although the primary school was still simple, it could not stop the children's thirst for knowledge. Ella and Kanglin taught the children together, and this experience made them both like each other more... After graduation, Ella went abroad to the university that Kanglin wanted to go to, and Kanglin returned to his hometown Fishing Net Primary School... Four years later, the classmates reunited. Passerby Ding did not change his original intention and was still pursuing Wu Tingting. Wu Tingting suddenly realized in her dream that she should cherish the person in front of her, so she decided to accept Passerby Ding. Ella, who returned from school, found it difficult to give up her original love, and decided to find Kanglin, who was still teaching at the Fishing Net Primary School on the beach, for love. Regardless of whether Kanglin and Ella's love can withstand the test of time, they will never forget it, and will never forget those people and things in the year of graduation, whether it is a sweet or sad story...