Which engine do you use to run the game and what are the programming languages involved, I would like to know to make sure it's not interferring with a personal project of mine. (I have issues with RenPy sometimes).
Also I noticed a glitch with time machine where if you have all the spells it and you load it, it will not load the fat concealing ring. This could be an issue with the underpass in the longrun if you selected curse of corpulence while in the underpass and tried to load.
Edit: Sorry for double negative in grammar, love the game so far but just one suggestion being that you could give the Pile of Clothes to the Werewolf after givng Him the Moon thing (srry cant remember exact name of it) and then have a triple branch option where you could cheat on the Bat or Shark and un-equip the Fat concealing ring after you went to underpass to get Curse of Corpulence, so that way whence you came back he wouldn't like you because: A:: you cheated on him losing his trust or B: Simply because you're to fat and only likes strong guys so you use the Love Spell to make him fall in love with you again allowing you to fix the mistake of unequipting Fat Concealing Ring and go back to route A.
If you have any questions about my suggestion I'll try and anwser.