When the boy she meets turns out to be a werewolf like her, a sheltered girl begins a forbidden relationship with that helps express their beastly forms but runs the risk of being discovered by the paranoid hicks of her small town.
You can drop “…with that helps express their beastly forms”. It would work great in your script, but unnecessary in the logline
Apart from that, It would benefit from raising the stakes; Editing with the information that the werewolves are endangered (and feared/hated) in this world works great with the use of keywords “forbidden relationship” & “paranoid hicks” so working in that direction seems only fitting
My only suggestion is to specify what becomes her GOAL as a result of what awaits them (since your Inciting incident doesn’t yet introduce an urgency, only hints at the conflict…)
You stated this as fantasy, but this is a love story. If humans are social animals, you just squared them and multiplied it with beasts. What is unique?
Fantasy must allow your audience to experience a whole new world. Twilight was not fantasy.
What I see from your logline is that there are two werewolves who meet and decide to have a relationship. As this is forbidden, they need to run and hide from their community and in the end they will die.
I do not mean to let your ambitions down. You may have a better and different story but this logline naturally attracts criticism.😅