Kakuzu x Temari. The two cross paths on different missions involving the same target and things really start to heat up as they continue running into one another and slowly get to know one another.
This is a lovely example of crack done right, and when I say “done right”, I mean making it work. I really love how detailed and insightful the author is when it comes to the characterizations, something that is wonderful to see in all fics but is necessary with lesser known characters and/or unusual pairings, I think. Like all fics with well-written crack pairings, this lovely fic has made me a fan.