Fullmetal Daemon Muramasa: NetherworldFull Metal Daemon Muramasa: The Demon World; Soukou Akki Muramasa: Makai-hen; Цельнометаллический Демон Мурамаса: Мир Иной; 装甲悪鬼村正 魔界編

***WARNING*** This manga takes place right after the True Ending of the visual novel. Minato Kageaki accepts a request from a man known as the Patriarchal Priest, who wants to be protected from musha who share the names of the legendary Japanese heroes of old.