Absolutely amazing! This story took my breath away. I chuckled here and there, and enjoyed the banter between the two of them. But it was the last few exchanges I liked the most. Setzer seeming so lonely, and Celes being able to see beneath the trappings of how he acts. And the last line was nearly tragic, because you get the impression that any confession would be hopeless...
I think your greatest achievement is making me feel for a character that I always overlooked in the game, but still kept him in-character. Thank you for writing such a beautiful piece.