Koji Makaino is a mangaka, and a musician, who goes under the pen and stage name as KOOGY. He wrote on a manga called Colorfuscical and tried to get his fans to vote for him in the surveys to ensure he would get serialized. He tried to work with Yuriko Aoki for a while before she left him to work with Nakai. He has vanished from the manga following the New Year's Party. One of his songs, EUPHORIA, is used as an inserted song in the anime episode Literature and Music.