post something blue, spike and Buffy shot with taser, experience memory loss

I'm looking for a fic set during season 4, shortly after something blue. Buffy and Spike are out looking for the initiative base and are both shot with an initiative weapon that scrambles their brains. They take shelter in a cave and when they wake up they have only their most recent memories, so they remember being engaged but not the circumstances. Thanks for the help!

Pretty sure you are after this one...

You an' Me Against the World by sweetprincipale
Set immediately after Something Blue. A run in with commandos ends up modifying Spike and Buffy's memories and isolating the pair. Believing themselves to be estranged lovers, they try to reconcile and still beat the Initiative.

Thank you! That's the one.