Yimo, who didn't stand out in college, just like ordinary college students, skipped classes, played online games, and spent his four years of college crazily with his friends in the dormitory. Perhaps, Yimo thought that was it at first. However, Yimo met Liao Jing. The arrival of Liao Jing brought earth-shaking changes to Yimo's life. Yimo became progressive and hardworking little by little, but at the same time, it also brought about the past buried in time. Whether it is to bring up the past again or not to dwell on the past, how should the group of wanton children go through those youthful days without any regrets? How should the love, hatred and hatred between each other develop? There is love, friendship, brotherhood, and sisterhood between them, and each of their living souls speaks of the regretlessness of youth.