The plot was that character A was filling out paperwork for SHIELD, which included a form about sex pollen incidents, and he forged B's signature as his go-to partner because he thought the form was a joke, then forgot about it. In true fanfic fashion there is sex pollen, A's form is called up, B has absolutely no idea what's going on, noncon and angst ensue.
I think A was either Tony or Clint. If A was Tony I think B was Clint (but it might have been Coulson), and if A was Clint I think B was Coulson (or possibly Tony).
I realize I am unhelpful. I can only apologize. orz