A manga spinoff called Centzon Hitchers and Undertaker was written by Manglobe and illustrated by Yumiko Harao. The manga was serialized in Shogakukan’s Monthly Sunday Gene-X from its March 2006 issue to the December 2006 issue. It was later released in two tankōbon format, the first in August 18, 2006, and the second on February 19, 2007.
It is set in a future where humans and AutoReiv androids coexist peacefully until a virus gives the robots self-awareness, causing them to commit a series of murders. Inspector Re-L Mayer is assigned to investigate, discovering there is a more complicated plot behind it that involves a humanoid species known as ‘Proxy’ who are the subject of secret government experiments.