There are many passers-by in everyone's world, and Lin Yi is no exception. The mysterious girl Du Xiaoyu flashes past, the top student in college who I thought I loved the most in my life, and many buddies who were called brothers at that time, but... However, they all parted ways after graduation and postgraduate entrance examinations. Lin Yi thought this would be the most painful thing in his life, but in fact, there was still a lot to experience, including losses and gains. It was hard-won, but it was also heartbreaking.