Kuro, Aka and Aoi each had a mysterious and painful past Aoi who was abandoned after her fathers death had become an object men used to relish their desires on Aka was sold to the devil and had come back to find her long lost twin brother Kuro, a girl trying to throw away her identity as a recreated human and throw away her past to become a normal girl. Follow these friends as they get entangled in the red thread of fate to linking their hearts together as they find ways to overcome their life