《三重门》是一部由一个少年写就，但却不能简单划入儿童文学的一般意义上的小说，它恰恰是以成熟、老练，甚至以老到见长的。17岁的韩寒注定要扮演不安分且引人注目的角色。他以一篇《杯中窥人》问鼎首届全国新概念作文大赛。然而，他却因期末考试的成绩单高挂七盏红灯而留级。在2000年还是用七门功课红灯照亮前程。眼下的韩寒已经成为一个“话题”——“一个‘高材’留级生引出的话题”。这个韩寒，何许人也？

Yong-ju, Gi-woong and Gi-taek used to be best friends in middle school, but in high school, Gi-woong becomes a member of the gang that bullies Gi-taek. As Yong-ju tries to fix this broken relationship, he realizes his special feeling toward Gi-woong.

After facing an irresistible change, what is she? Still him? Two women with different personalities have unexpectedly become the best sisters - He Xizhen, Liu Wanting, who like the above students at the same time, but in fact Wen Haosheng has long noticed Liu Wanting, in the hope of his friend, Yu Ting When the twins entered the relationship, the three also formed an intimate triangular relationship until an accident caused Wan Ting to discover that she had a double sexuality, and at this moment she must choose to live as one of the genders. Wan Ting unexpectedly refused to let the twins and Xi Zhen get caught off guard. After many years, Xi Zhen and the twins appeared a pure-looking boy, Liu Ting.