 The manga was published by Kodansha and serialized in monthly Magazine Z. The two volumes were released on October 23 , 2000 and August 23 , 2001 respectively . The manga was re @-@ released in bunkoban format with the two volumes labeled " Jō " ( 上 , First ) and " Ge " ( 下 , Final ) in two individual box sets titled " Kodansha Box " . Jō volume was on May 7 , 2007 and the Ge volume was released on June 4 , 2007 . An edited tankōbon version of the manga that was released in box sets , were released on January 10 , 2012 and February 9 , 2012 respectively . 
