Kouji Seo (瀬尾 公治, Seo Kōji, born July 26, 1974) is a Japanese ''mangaka'' whose works tend to have a strong focus on romance. Most of his series take place in the [[TheVerse same universe]], where characters from a previous series often have cameos in his currently running series.

His work includes:[[index]]
* ''Manga/HalfAndHalf''
* ''W's''
* ''Manga/CrossOver''
* ''Manga/{{Suzuka}}''
* ''Manga/ATownWhereYouLive''
* ''Manga/PrincessLucia''
* ''VideoGame/LovePlus Rinko Days''
* ''Manga/{{Fuuka}}''
* ''Manga/{{Hitman}}''
* ''Manga/TheCafeTerraceAndItsGoddesses''
[[/index]]