Onechanbara is a series of third-person hack-and-slash games developed by Tamsoft, originally appearing as part of a budget game line released only in Japan and, yes, Europe. The games involve a team of sisters, Aya and Saki, who are among the few survivors of a zombie outbreak. Complicating matters, both sisters suffer from a curse known as "Baneful Blood", which drives them crazy when they come in contact with the zombies' blood. They have vowed to use everything in their power to drive back the zombies so that they can once again live in peace.