Multiverse with the Ultimatrix Novel

James dies and is reincarnated into the Multiverse, where he obtains the Ultimatrix. Using a hub world as his base, he explores various universes that largely follow their original canon with unique twists. The protagonist is strong but not overpowered, relying on his own abilities and basic resources from the hub world rather than a system. Throughout his journey, James encounters female characters who develop romantic interest in him and pursue their own storylines. The narrative spans multiple worlds including Family Guy, Kino Der Toten, Aladdin, High School of the Dead, Transit, Monster Musume, and the Demon Lord universe. All characters engaging in sexual content are 18 or older. The story features NSFW scenes, harem elements, incest, adventure, zombies, mechs, and a fun tone as James navigates these interconnected realms.