When I was little, I longed to become an adult right away. I thought being an adult would give me more freedom. But as time went by, when I really grew up and became an adult, I realized that I had the happiest time at that time. I was born in 1990, and I am experiencing the youth story of the post-90s generation. If you have friends who laugh with you, you can look up and see the back of your loved one sitting in his seat and listening carefully to the class. Jay Chou's "Sunny Day" is constantly playing in the headphones, and the room is covered with posters signed by Edison Chen, TVXQ, and Wilber Pan. I would go to school every day to discuss the plot of "Legend of Sword and Fairy" with my classmates, and I would also sing "Born to prove the traces of the existence of love" along with the BGM. Girls will argue about who is better, Zhao Ling'er or Lin Yueru, while boys are all obsessed with Liu Yifei. Maybe you will remember that at that time, it was very popular to trample on the mainstream spaces. You would go to post bars to fill people up, and use non-mainstream avatars to steal pictures from other people's spaces. Once you enter, you can hear the raps of non-mainstream female voices. In school, there are always a few "campus legends" that no one dares to mess with. However, time is something that catches people off guard. The latest generation of those born in the 1990s have already grown up, and our youth is deeply rooted in our memories.