月刊IKKI
"RideBack", written and illustrated by Tetsurō Kasahara, was serialized in Shogakukan's "seinen" manga magazine "Monthly Ikki" from April 25, 2003 to October 25, 2008. Shogakukan collected its chapters into ten "tankōbon" volumes, published from May 28, 2004 to February 25, 2009.