Code Geass: Renya of Darkness

Code Geass: Renya of Darkness is a spin-off manga series set in the alternate history universe of the Code Geass franchise. Conceived by Goro Taniguchi and illustrated by Tomofumi Nakajima, the series was serialized in Kadokawa Shoten's Shonen Ace magazine starting in 2010. It was developed to expand the world-building of the franchise, shifting the focus away from the protagonist of the original anime and instead exploring the Edo period of Japan through the lens of the series' established supernatural lore and the Geass power system.

The narrative follows the titular character, Renya, who becomes entangled in a struggle involving secret organizations and the immortality-granting Geass. The design of the series reflects the transition of the Code Geass aesthetic into a historical setting, blending traditional period-appropriate imagery with the stylized, angular character designs characteristic of the franchise. It was received as a niche expansion for dedicated fans interested in the broader mythology of the series, offering a darker, more contained story compared to the expansive geopolitical drama of the main anime entries.