Knowing Hamita's(author) past degeneracy in their works.(rape, slavery, suicide, prostitution, etc).
I would absolutely not be surprised if she gets "liquids" from the old men in other ways.
Edit: I was joking, but she really IS getting liquids through sex in the author's fanbox
The thumbnail seems to be her in this same building shown in this chap.
She's probably with the protag is my bet.
But then again this author has done sex scenes of previous heroines from other manga with other men before in their fanbox, so who knows.
Link to the thumbnail, but its a paid sub to see the full work(no it's not yet in Kemono party I checked)
https://hamita1220.fanbox.cc/posts/5793517