Hey, I've come across a bit of a bug.
after you talk with Fawn with harsher play in her apartment and go to her. She tells you to put on the collar. when you select yes, it puts on the collar but then loops back to the put on collar options of yes or no. Yes just causes an infinite loop and no just backs out. As I can tell I can't progress her storyline anymore because of it.
actually if you go to her with the collar already equipped it goes through it normally. if you don't have it on the bug appears.