Komatsu Masao is a friend of Hitoshi Aoshima, together with Itou Shirou they are in Male Volleyball Club being forever-bench players. He has former and leader of DX Brigade or formerly known as Anti-Dobashi Brigade. A group made of a bunch of losers who despise all the riajuu (normalfags) that enjoying their lives the fullest. Their number one enemy is "The Refreshing prince" Dobashi Yuuki. Their HQ is located at the Audio-Visual Room. He likes bodybuilding, wrestling and action movies.