"HiGH&LOW: Episode O" is a TV series directed by Shigeaki Kubo, planned and produced by EXILEHIRO, starring Kazuma Kawamura, Kitato Yoshino, and Yuki Yamada. It was broadcast in Japan on July 17, 2019. The drama is the third TV series of the "HiGH&LOW" project and the prologue of the movie "HiGH&LOW: Episode O". It describes the "Oyaka High Warring States Period" where many forces compete and the story of the passionate friendship between boys. The notorious Oyaka High School, which gathers bad students from all over the country, is divided into part-time and full-time. The part-time Murayama Yoshiki (played by Yuki Yamada) has become the overlord of the school. Kaede Shio Hanaoka (played by Kaede Shio Kawamura) and Takajo Tsukasa (played by Kitato Yoshino) enrolled in Oyaka High School with great fanfare, but Kaede Shio decided to transfer soon after. After Kaede Shio left, Tsukasa watched his "top position" quickly fade. But apart from Si, the Hong faction, Taiqing faction, Zhongzhong faction and other factions are fighting for hegemony and competing for the "top", and the "Ghost High School Warring States Era" is getting more and more intense. On the other hand, Feng Shixiong, who moved to the countryside where his grandfather lived, seemed to be missing something in his life. Afterwards, the conversation with his grandfather had a great impact on Feng Shixiong. Feng Shixiong didn't know that there was not much time left. Si and Feng Shixiong were groping for what is "powerful" and what is a "partner" in their respective deep environments. The prologue of the story towards the future has begun.