Let me out.Li Yun howled and patted the door panel. After crying for a long time, he became tired. He sat softly and leaned against the door and fell asleep... Once again, Li Yun woke up from the same dream.What happened a few years ago, but I often recall it in my dreams recently.When he was young, Li Yun was particularly naughty. In his parents' words, he had ADHD and often fought with his friends.Moreover, when Li Yun started to fight, he was particularly ignorant of the importance of it.