Full Metal Daemon: Muramasa - Massacre

Full Metal Daemon: Muramasa - Massacre summary:

The first of the manga spin-offs of the original visual novel by Nitroplus. Minagoroshi takes place prior to the game's prologue and follows the story of Minato Kageaki arriving to a remote island and fighting a group of four Mushas to destroy one of Ginseigo's "Eggs."