高崎是一名高中生，更是一个孤独的人。他很少说话，除了自言自语。唯一能让他感到快乐的，是在天台上的经历。但随着次数增多，他开始问自己一个问题：次次走上天台，到底有何意义？

Gao Qi was a high school student and a lonely man. He seldom spoke, except to himself. The only thing that makes him happy is the experience on the rooftop. But as the number of visits increased, he began to ask himself a question: what does it mean to go on the roof?