Infinite Dendrogram Manga Omnibus Volume 2 contains volumes 3-4 and features story by Sakon Kaidou with art by Kami Imai.

Ray's climb towards becoming a super paladin continues, but it's never as easy as anyone hopes. While walking the streets of Gideon, fighting off a band of hoodlums harassing a young woman, he meets a flamboyant new ally named Hugo, and the two decide to cooperate in order to take down a nefarious criminal group known as the Gouz-Maise gang.

But little did Ray know that this seemingly simple rescue mission would cement just how gruesome a reality the world of Infinite Dendrogram could become. Can Ray keep his in-game life — and dignity — intact, or is he just another cog in the machine of Infinite Dendrogram?