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Kasumi and his younger brother Kiriya were born and raised in a family that served as Shinobi for generations from the Warring States period. The father who was attacked by someone and was waiting for the two who had completed their mission and returned home. ... and my father became a man who never returned. Succeeded in infiltrating by finding the hiding place of the man who seems to be the criminal by the obsession of the siblings who "must be defeated with this hand". One more step to clear my father's remorse! "Sister ... I'm sorry ..." There is a figure of Kiriya with a sword stuck in her throat. Kasumi had no choice but to be violated in exchange for his younger brother's life ...