Takumi is the main character of the series: Chaos;Head. He is a hikikomori and only attends school in order to fulfill the minimum for graduation requirements. He often and repeatedly notes that he is not interested in girls in the three-dimensional world and avoids conversations with others whenever possible. He prefers to engage in watching anime, playing eroge, and massively multiplayer online role-playing games. He is a second-year student at Suimei Academy (翠明学園, Suimei Gakuen).