I found out what shikkoku no renya is


It is either, (Code Geass: Jet-Black Renya or Code Geass: Renya of the Blackness)

ooh yeah, here read this stuff its important to

The story takes place in the same official Code Geass history as the anime, but in a different era. The title character, Renya, is a 17-year-old boy with a mechanical left arm and shuriken throwing stars as his weapons of choice. The story begins when Renya encounters a mysterious, perpetually young witch named "Reifū C.C." C.C. has appeared in Japan's historical Edo era to seek a new partner for a covenant. Meanwhile, a mysterious man, with a striking resemblance to the character Lelouch of the original anime, also appears with unknown intentions.

i got that info from http://www.animenewsnetwork.com/news/2009-12-07/code-geass/shikkoku-no-renya-manga-to-launch-in-2010