There are always some people and some things that linger in our memories. Even though they have passed, we still smile knowingly when we think of them. Maybe it's not all good, maybe it's more sad than happy, but we still choose to keep it in our hearts. Some people may no longer be around, but they still give us warmth; some things may have gone far away, but we still keep them in our minds and hearts. This is Xu Nuan's story, one person's loving time; this is also the story of a group of people, in memory of our youth that will eventually pass away. Youth is beautiful because it is not pale and colorful.