Credit goes to literati for the icons used in the chapters.
Title: I'd Also Like to Test That Theory
Rating: PG-13 (maybe R) for Chapters 1,2, and 4. NC-17 for Chapter 3.
Summary: As Giles confronts Willow at the Magic Box, he's surprised to see Wesley join him in the fight. Things play out a different way, with an illumination into their past.
Disclaimer: I own nothing.
Spoilers: End of AtS Season Three (vague, I think nothing concrete) and end of BtVS Season Six.
Warnings: Language, blood, violence, M/M sex (Chapter 3)
Author's Notes: Feedback appreciated. Enjoy!