OniTensei The Demon Collection

There is an ancient legend that says if a tattoo is drawn to perfection it will come to life Reiko Kure is a female detective with a strange massacre on her hands Some kind of huge anime savagely murdered thirteen members of the mafia and only the quiet Ema Nozomi was left at the scene Ema is taken into protective custody However every man left with her is killed and every woman left with her is raped There are no clues except the innocent Emas strange tattoo perfectly depicting a demon