Han Geng Doujinshi or TVXQ Doujinshi was a kind of Doujinshi novel that adapted the plot of the original novel or anime by using Han Geng in SJ or TVXQ in TVXQ as the main character. It narrated the story from their perspective and added some original plot to enhance the appeal of the novel or anime. This type of novel or anime usually involved Korean Entertainment and TVXQ, including their music, dance, interpersonal relationships, and so on. They could also reflect the love and pursuit of different fans for idols, as well as the reference and integration of Korean culture and Western culture. It should be noted that the creation of doujinshi novels must abide by the relevant provisions of the copyright law and cannot be published or distributed in any form without the author's authorization. Therefore, when creating such works, one must abide by relevant laws and regulations and respect the intellectual property rights of others to avoid the occurrence of copyright infringement.