These vary in how well they fit different aspects of what you want...
This is a great fic if you haven't read it yet, but it isn't short 70k, Buffy didn't die and it's PG-13 too. It is quite a tender nice change to S6.
Et Lux In Tenebris Lucet by Enigmaticblue
Spike manages to save Dawn, but pays a terribly high price. Will he be able to find meaning in his suffering?Another one, med length around 30k, where it develops without the depression angle is...
Love's Gift by pfeifferpack
What if Buffy didn't take that dive off of the tower in The Gift? What if she saw Spike for the man he was becoming and spent the next year without the depression caused from her being pulled from heaven? Could they have progressed to love on a natural course. Begins at climax of The Gift then AU. Bite Me, Stake Me, Do Me by greyangel is S6, definite smut and it is shorter around 18k, a fun/fluff kind of friendship one but there isn't much content it is pretty porn without plot. I have this in word if you would like it.
Set at Halloween during season six. Buffy and Spike hang out together on All Hallows Eve where a game of kitten poker leads to a drunken bar fight, that leads to a round of drunken dares and bets, that leads to a visit to a tattoo parlour and eventually leads to them ending up in bed together...naked! And that's when the fun starts...Med one about 21k, probably fits more closely than some of the others...
Instant Sun by verity watson
Takes place in Season Six, after All the Way, which means it is before Buffy and Spike kiss, but after she confesses to Spike that she was in heaven. Only no Giles on hand, sorry. Written because I've been dreaming of tropical islands in the midst of winter.Mid length around 24k, they only have only a brief friendship angle before it gets physical in this one but it isn't the canon depressive/negative sex stuff...
The Hunting Trip by kittencaboodle
Buffy convinces Spike to go hunting in the desert... what could happen?This one is shorter around 18k...
Fevered by kantayra
This is set somewhere early in S6, before 'Once More With Feeling' but after 'Life Serial'. So Buffy's, y'know, being nice to Spike and actually treating him like a worthwhile person and all that. When Buffy gets the flu, it's up to Spike to kiss it and make it all better. Set in a somewhat happier early S6.
