An original story set in the framework of the first Majin Tensei game. Tokyo in 20XX, after the Third World War: the A.G.E. Corporation has developed a new energy source and built a city called Neo Tokyo around it. The protagonist allies themselves with various figures whose motivations pull in different directions. Which alliances the player chooses shapes the outcome — multiple endings reflect the different factions at play. Demonic negotiation and demonic fusion return, alongside a simplified take on the mechanics that define the Majin Tensei series.