It's about this bitchy mean lawyer who wants to become a partner but she's a bitch to the wrong lawyer. He somehow blackmails her or kidnaps her to hai bdsm palace where he trains slaves. She gets a femdom who she ends up falling in love with. There is a scene where she is caught masterbating without permission and get genital piercings as a consequence. He trains her to become a slave then a sub. I remember they used plait to describe braiding hair. I remember that the bitchy lawyer turn sub had blinded hair. The whole story had super long parts to it and had a title like name became sub or slave or the training of name. I read it 2010s. I've been looking for this for years.