I don't remember the author or where I used to read it.
It's about a white girl who is captive of some guy but is restrained to a chair and turned into an asian woman by two other women - one latina iirc and one black - who also used to be white and have been brainwashed into his slaves. There is some heavy mental transformation at the end where she is basically identity deathed and some lesbo content between the two other girls.
It's a pretty dark and kinky tf for those who are into that sorta thing.
Anyone have any idea what I'm talking about?