Kamen Rider Kuuga manga volume 5 features story adaptation by Toshiki Inoue with art by Hitotsu Yokoshima and is based on the original concept and story by Shotaro Ishinomori.

Detective Ichijo cares for nothing more in the world that his sister Karine: the victim of a terrible crime, that left her heart broken. Years ago, seven girls were kidnapped but only Karina survived… the perpetrator Yukina Tsugami was locked away… but little does Ichijo and Kuuga know that she is in fact the legendary Agito.