Leave Me In Ruins

Derek finds himself in a difficult spot when he mistakenly sleeps with Stiles. The two agree to forget it, but Derek can't.
Before long, it's becoming a regular thing. Now, Derek has to deal with the issue of falling even more for Stiles or losing him all together.

Stiles never dreamed of waking up next to Derek, but it's now a regular thing. However, he has to keep his emotions in check so Derek doesn't realize how he truly feels all while keeping their 'relationship' a secret from the pack and fighting the new big bad in town.