Sleepy Town of Beacon Hills

Penelope, Scott, and Stiles had been best friends their whole lives. They did everything together, so why would being pulled into the supernatural world be any different? But with Scott going through his own mess, will that overshadow what's happening to Penelope? And when feelings get muddled, and relationships form, tensions rise.
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You can anticipate throuple Scott/OFC/Stiles, and other than that it will pretty much follow the show, each chapter being an episode.
This will lead to a polyamorous relationship, if you don't like that, you don't have to read. Thank you.