"I will definitely prove to you that you like me." He once said. "I will definitely forget you." She once promised. However, in fact, they did not keep their promises. They haven't seen each other for a year and are isolated from each other. What is the reason that separates them, and what is the reason that brings them back together? It seems that the university is a little different without you. It is also because of you that my life is filled with happiness. As for the rest, who cares?