Y/n "Pines" is shipped up to Oregon with her younger twin siblings to spend the summer in the small town of Gravity Falls. Soon to be a Senior in high school, Y/n has a lot on her plate- college applications, scholarships, worsening intrusive thoughts- you know, the normal stuff. Buried in her own secrets and feeling like a blacker sheep in a family of already black sheep, she turns towards the mysteries of the small town, creating her own theories and learning even more from the journals. From day one, a certain triangle has taken an interest in her, and aims to use her to help escape the mindscape and "liberate" our dimension. However, the interest soon spawns an unusual bond between the two, encouraged by a mysterious third party that is strangely attached to the girl. As insomnia, Bill's antics, and worsening thoughts taint her mind further, will Y/n be able to get through the summer with her head screwed on straight, or is she bound to combust under the pressure of all her bottled emotions and hidden secrets?
Disclaimer: Gravity Falls doesn't belong to me obviously lmao
The heavy Bill x Reader relationship stuff comes later into the story cuz I'm a SIMP but I like building stuff up (like it's kinda slow but trust me it's worth it I think)
Also, since "Y/n" was technically a very very very old OC of mine, she already has her own personality and appearance. But please, don't let that stop any of you from reading if you want to; just switch and replace some description/pronoun stuff around. It's all cool. If you simp for Tumblr-sMeXy-Illuminati-Dorito-Man, then you've (potentially?) come to a good enough story for your needs.