Awake and Unafraid (31047 words) by Green
Fandom: Teen Wolf (TV)
Warnings: Graphic Depictions Of Violence, Underage
Relationships: Derek Hale/Stiles Stilinski
Characters: Stiles Stilinski, Derek Hale, Alan Deaton, Scott McCall, Claudia Stilinski, Peter Hale, Marin Morrell, Sheriff Stilinski, Isaac Lahey, Erica Reyes, Vernon Boyd
Additional Tags: Alternate Universe - Fusion, Alternate Universe - Canon Divergence, Alpha Peter Hale, Alpha Derek Hale, Beta Derek Hale, Human Scott McCall, Minor Character Deaths, Alive Claudia Stilinski, Car Accident, Parallel Universes, Magical Stiles Stilinski, Rebuilt Hale House, original non-human characters - Freeform, Spirits, Spirit Guides, Mates
Since the car accident that took one of his parents (or both, or neither), Stiles has been living two alternating parallel lives.