this a world where slavery is legal and humans can give up their rights and become someone's slave and become their property. these slaves can be modified to fit the needs of the owner like a laborer slave can get muscle modified for better working ability and a sex slave can get her holes modified for better pleasuring ability. in this world slaves are treated like animals like dogs or cats unless there are some special feelings involved and pedestrians do not get shocked seeing naked slaves on the streets. if it is someone they knew they may stop to jeer or verbally humiliate but generally do not care much more than that and will treat them like they would treat any domesticated pet animal. the modified human slaved do not get major cosmetic modifications and still maintain human looks with only some slight changes but internally they can be changed a lot.