Lee-ith dreams of becoming a cool indie rock musician. Because of his complete disregard for his studies, his mother sends him to a new school, one that's accepting male students for the first time this year. Attending a school with girls for the first time, he sets himself a strict rule to keep love from ruining friendship. He immediately clashes with studious Putter who ends up being his roommate. However, as he and his roommate grow closer, he finds himself challenged to follow his own rule。可是到了三环线的检查站却完全不同,整条三环线全是沙袋铁丝网,沙袋后面是全神贯注的机枪手,个个如临大敌戒备着三环外的空间,铁丝网最少有十米高,你就是燕子李三来了也要惦量惦量,更何况每隔几百米就有一座了望……