These two are so damn twisted. They deserve each other really.
I mean Shimamoto (the light haired one) didn't really do anything wrong.
Having surgery to change your life is normal, and while choosing to model your face after a classmate is a bit creepy, she was just trying to improve her life.
While having surgery by itself is normal, it's clear that it was done out of an unnatural obsession with another person.
While not necessarily immoral, it seems like a very destructive and unhealthy choice to make. I don't think "did nothing wrong" is the right way to put it.
All in all it was an interesting story, even if yuri wasn't the main focus.