The Last Master and the Demon Soul Dragon Heart

Chaldea thought the worst was over after sealing the Salem singularity—contracts dissolved, transfers locked down, quietly awaiting new management. But neither the eccentric fox nor the infamous E-rank princess arrives. Instead, a catastrophe rivaling the Incineration of Human Order itself tears through reality without warning. As dimensional barriers crumble and the two-dimensional universe collapses around them, the last Master must face an unprecedented crisis that will test everything they've fought to protect.