Fanfic where everyone is an angel.
Alpha! Omega! AU Dean! Alpha! Cas! Omega!
Every year the angels have an annual 'chase' where the alphas chose their mates. And this is the year Castiel will never forget.
Thoma gets fed up with his neighbor's noise and writes (very pretty) passive aggressive notes and slides them under his door, tapes them onto his door, and everything else he can think of to get him to quiet down.