Tomoharu's older brother. Still unknown whether he died few years ago or is still alive. His silhouette appeared in the third episode of Asura Cryin season 2 when Tomoharu is in danger. He was tricked in order to appear in the 7th episode. Then he was shot by the owner of the Koala and died.
In the 6th episode, it is known that the real Naotaka actually died and he is Tomoharu Natsume from the First World that appeared in Second World[. The real Naotaka in first world is the center of the experiment that caused the time and space to open up and everything's beginning.