 A second manga, illustrated by Yuji Iwahara, the original character designer for the anime, finished serializing in Square Enix's Young Gangan seinen magazine under the title in March 2011.This is a separate one from the first and it is a new story taking place one year after the events of season 1 and it replaces the events of both the OVAs and season 2 completely.The original soundtrack was composed by Yoko Kanno in 2007 and contains a total of 20 tracks including the first opening and ending themes performed by Abingdon boys school and Rie fu.