From Eroica With Love: A Matter of Seeing Things Differently by TelWoman (Mature)

Pairing: Klaus/Dorian
Length: 7900 words
Warnings: None
Site: TelWoman on AO3
Why I am recommending this: A great mission fic that takes all the ingredients of a canon adventure - Klaus on a mission for NATO, Dorian's own plans for an art heist getting in the way - and does an excellent job of showing Klaus's POV of Eroica and his interference in Klaus's serious high-stakes espionage world.

A Matter of Seeing Things Differently