The first time I played this i quit halfway through since it looked like some kind of furry sex game, with great art though, which is absolutely not my thing. I decided to give it a try again and I'm glad I did.
In case you didn't find the journal: Read it. It's in the trash bags.
I missed it myself before, but after reading it the whole game has a lot more meaning. The broken mirror was pretty clear to me what it meant but the journal was the finishing touch.
This might be completely wrong, probably, but this is how I interpreted it.
The rhino is obviously the one that owns this place. The main character has a debt, the debt being the cause of her having to live in a place like that, and do things like that. But what is the debt?
In the journal they talk about someone's daughter, I take it that the journal is from her, so possibly she has a child but could not raise her since she doesn't have the money or because of other things.
The journal said something about her mom teaching her to not follow the rules, and that this place is a jail, so 1. she's talking about the prostitution as "not following the rules" or 2. She did something and got in trouble with the police/law, making her unable to raise her daughter, and end up in that "jail".
In the end we see the mirror, where she first appeared, but now she's just a lump of meat, as she called those persons herself.
Honestly, this could be so wrong and the actual story would be about a flower or something lmao but this is what i thought.
The game is wonderful and I'm definitely glad I decided to play it again, thumbs up to the creators.