The new game is a sequel to the first, and will star a new “absolute god” protagonist, Sirma (シルマ), who seeks to conquer the 12 worlds created by a certain other “absolute god”.
In the first game, absolute goddess Chou-chou sought to conquer the seven-colour planets in the first game; which inadvertently meant that she had to liberate those planets from their demon-lord kings. I didn’t exactly play the game so I have no idea what happens in the end, but there are apparently multiple absolute gods in Mugen Souls’s universe.
Ryoji, Nanamedakei, A-10 and other artists who worked on the first game once again return do to the character designs for Mugen Souls Z, with music by Tenpei Sato (he also provided the catchy tunes for the first Mugen Souls). Idea Factory’s Kenta Kanno serves as Director on this sequel.