Rating: NC-17 overall
Pairing: AlHei, RoyEd and Hei->Ed overall.
Length: 6, 086 words for the newest part.
Summary: Alfons and Edward: demon hunters. Roy and Alphonse: demons. All well and good, up until they all meet. One big mess later, Alfons is missing a partner, and Alphonse is missing his horns. They make a deal to help each other recover what Roy took from them, wondering whether the fire demon was motivated by a random desire for a human pet or something darker.
Part 1- Chapter 1. Chapter 2. Chapter 3.
Interlude - #1: Ed-side. #2: Al-side.
Part 2 - Chapter 1. Chapter 2. Chapter 3. New -> Chapter 4 (part 1/2).