Kōji Seo(瀬尾公治Seo Kōji, born July 26, 1974) is a Japanese manga creator. He debuted in 1996 with the one-shot "Half & Half" in Fresh magazine. His two hits, Suzuka and Cross Over, both mixed the genres of sports with high school romance. Suzuka focused on track and field while Cross Over used basketball. It is also interesting to note that the main love interest of the male protagonists of several of his works are extremely similar in appearance, namely in Half and Half, Cross Over, Suzuka, and A Town Where You Live.