Ok, I'm well aware I'm gonna sound desperate and more than a little perv. But I love spuffy, particularly NC-17 spuffy. But it's begining to be close to impossible to find good ones that I never read.
I want... Tension. Lots of s.exual tension. I want stories in which Buffy and Spike don't just jump each other and do the deed in, like, the first chapter. I wanna see some seduction first, some tension, some struggling against what they want... But I want to be able to feel the irresistible desire between those two silly things. I want a NC-17 that leaves me breathless, with REALLY HOT s.ex scenes... But without that annoying thing some authors do when they start throwing s.ex scenes ALL THE TIME and totally forget about the story... because that needless pushing of the subject makes the story tiresome. I want fics that are good from the begining to the end, stories that really hook me.
So, I desperately ask you guys to rec ALL stories that had the effect described above on you. The more fics you know, the happier I will be. I don't care about anything else, if it's cannon, AH, and what the story is about... If it's good and fit what I asked, I'll be happy to read it!

I'm really sorry for sounding this crazy, but I'm getting seriously frustrated.

Thank you all already,

Cay.

Well, I like long long fics with good plots so I'm not sure if these are what you want but I recommend:

Tailored Encounters by Im_bloody_English

http://spikeluver.com/SpuffyRealm/viewstory.php?sid=19688&warning=NC-17

Summary: Buffy Summers is successful and content with every aspect of her life save one: her sex life. Sick of methodical vanilla sex with her current boyfriend, she still has never been able to achieve an honest first-rate orgasm in her entire life. Then one day she stumbles upon a mysterious escort service online that offers her hope of a perfect sexual experience and impulsively decides to seek out their help. What starts as a simple business transaction turns into a night of unbridled passion-filled sex with the handsome stranger the service pairs her with, leaving both of them to question if once is truly enough.



Room Service by PaganBaby

http://spikeluver.com/SpuffyRealm/viewstory.php?sid=80&warning=AO-AdultsOnly

Summary: AU, All Human. Buffy is spending the weekend in New York, away from her friends and family. She's lonely until a gorgeous, blonde man steps into her life and her hotel room.




Mixing Business with Fanfic by Sotia

http://spikeluver.com/SpuffyRealm/viewstory.php?sid=30582

Summary: In a Universe where BTVS never existed as a show (*shudders at the thought*) Elizabeth - Beth - Springs has just gotten a job with her step dad's company. On slow days - which come about a lot of the time - she reads Spuffy fanfic that seems only accessible from her work PC. What happens when William, head of the IT department and the only person seeming less than happy with her working there, decides to find out what she does in front of her computer screen all day

Addie Logan has amazingly well written sex in her fics. From your requirements, I'd say Learning Curve could fit the bill. Gardens of Oblivion is very hot, but they do sleep together in the first chapter or so. However, the story is brilliant and one could hardly call it PWP because the emotions and struggling for both Buffy and Spike is just so well written.

Learning Curve by Addie Logan *WIP*
Summary: At Sunnydale High School, two things are indisputable: Buffy and Angel are the perfect couple and Buffy and Spike will always be enemies. But when one rule breaks, Buffy decides to break the other one, too, in a desperate bid to recapture Angel's heart. However, Spike soon forms a plan of his own, and Buffy begins to realize maybe nothing was ever how she thought it was.

http://dark-solace.org/elysian/viewstory.php?sid=2311&warning=NC-17

Gardens of Oblivion by Addie Logan
Summary: After discovering her husband has been cheating on her, Buffy Summers decides to get a little revenge before she tells him good-bye. However, her plan takes an unexpected turn when the man she meets is more than he seems... (AU, not all human)

http://dark-solace.org/elysian/viewstory.php?sid=2014

One of my personal favourites and bursting with UST is Murphy's Law by Im_Bloody_English. It's a *WIP*, but it's really long and it ends in a place where you're not left frustrated.

Summary: Past Featured StoryYou know what it means... whatever can go wrong, will go wrong. 'Murphy's Law' comes into play from the moment our two favorite blonds meet despite any initial attraction to one another. What's the result when a womanizing genius and a prudish workaholic are forced together in every way with no choice but to deal with each other 24/7? Tons of UST! Will it ever get resolved, or will they kill each other first? .... "Tell me somethin', pet. Wha's the real reason for your knickers bein' in a twist aside from the possibility you put your plug in sideways?" .... "The fact you're still breathing is number one on a very long list of reasons and oh-my-God... crude much?"

http://dark-solace.org/elysian/viewstory.php?sid=2150

In the Army Now by Im_Bloody_English
Summary: Buffy joins the military and heads off to Basic Training. The Boot Camp experience can be rough enough to endure, but there's something, or rather someone that will make her time spent becoming a soldier ten times worse... a Drill Sergeant sent straight from the bowels of hell that takes an instant dislike to her mere presence, Spike. He's evil, he's mean, he hates her but even worse... he lusts for her. This is not a military fic or even a fic about the military. The Army serves only as the backdrop-setting to the story, so don't shy away from reading.

http://dark-solace.org/elysian/viewstory.php?sid=1581

You could also like Love Me by Slaymuch
Buffy was dumped by her boyfriend, Angel, for being an inadequate girlfriend in bed. Desperate to get him back, Buffy asks her best friend Spike to tutor her in the ways of lust. Will their friendship remain the same as the bleached blonde teaches Buffy how to please a man in bed?

http://dark-solace.org/elysian/viewstory.php?sid=1566

I also wrote a story that you might like. I can't objectivelly judge if the story is a good enough NC-17, but there's UST and lots of banter.

Denial by The Enemy of Reality
Summary: Forced to be close together for an infinite amount of time, it stands to reason that mortal enemies would drive each other insane. But when it comes to a self-righteous, uptight slayer and an irritating, chipped vampire, there is no reason. This story, set just after the end of S4, is full of banter and innuendo, so read on if you are interested.

http://dark-solace.org/elysian/viewstory.php?sid=2966

I'm currently updating a story set at the end of S3 with lots of UST too. It's not finished yet, but I do update it regularly (twice a week).

Running from the Inevitable by The Enemy of Reality *WIP*
Summary: With a tub of ice-cream in her lap, Buffy wallows in misery over Angel disappearing out of her life in a puff of overly dramatic smoke. Her life gets turned upside down when her hated enemy staggers drunk off his face to her front porch. Not only is he demanding her help, he is invading her personal space. She's had enough!
Post-S3. Angel and Drusilla are a no show. Meanwhile Buffy and Spike embark on an adventure full of childish bickering, UST and reluctant camaraderie that will change what they thought were unshakable perceptions.

http://dark-solace.org/elysian/viewstory.php?sid=3181

Excuse my terrible self-pimpage. I hope you'll find something you like in the stories I recced.

The Truce by Eternal_Red *WIP* Definitely worth checking out.
Summary: Once in a galaxy, far, far...oh, that's been done. Right then. Humankind has been at war with the Aurelians for decades. When the two sides finally reach the point where negotiation is better than annihilation, a truce is called and a treaty negotiated on the planet currently under dispute. The peace treaty is cemented symbolically by the joining in marriage of the two youngest soldiers present, thereby throwing Buffy and Spike into a relationship that they really, really, don't want. Although not a traditional Vampire versus Slayer scenario, it is close enough to be familiar.

http://bloodshedverse.com/stories.php?go=chapters&no=9046

Very naughty Head of the Class by PaganBaby
Summary: Buffy is a young, enthusiastic high school teacher. She can't stop thinking about one of her students, Spike Giles. He's a trouble-maker...he's a rebel...he's really hot. Spike has it bad for his new English teacher, Buffy. But they could never act on their urges...could they?

http://dark-solace.org/elysian/viewstory.php?sid=613

No Vacancy and it's sequel "open all night" by Kindred are fantastic. Particularly the first one!

http://www.nocturnal-light.net/fanfiction/story/122

Okay, for my best NC-17 fics that left me absolutely riveted I would have to start first with Holly DB, she is a wonderful author with fantastic love scenes and drama all around.

My first recommendation for the type of fic that builds in a way you are looking for would have to be Grey Gardens Of Shadow Rapture By Holly DB http://spikeluver.com/SpuffyRealm/viewstory.php?sid=4002&warning=NC-17
Summery:Crossover with The West Wing. A rogue Slayer is on the run. As the Scoobies follow reports and sightings that lead them further into the Old South, President Bartlet prepares for a speech in Vicksburg while Deputy Chief of Staff Josh Lyman is assigned a project that will unwittingly change his life.

Its incredibly well written and though a crossover you don't have to know anything about West Wing to fall in love with it.
It has a sequel though only half finished called Gardens Of Crimson Roses, if you are as riveted as I was buy the end of the first fic, you will most certainly read the sequel.

Second of her's has got to be In Omne Tempus http://spikeluver.com/SpuffyRealm/viewstory.php?sid=13306
Summary: For a hundred years, William the Bloody has led a trail of bloodshed and chaos across Europe and the Americas. That all comes to an end when the woman he's devoted his existence to brings his mate to him in the guise of a late-night snack. A small girl with eyes of green and blonde hair. And suddenly, Spike is thrown into a world of color beyond the black and white, and his life is never the same.

This is also an incredibly heart filled tail that will leave you on the edge of your seat.

Any story by her is amazing but these are my favorites.


My next runner up would half to be Dampersandspoons she is an incredible author with tons of great stories like the one your looking for. My personal favorite is Only Time Will Tell http://spikeluver.com/SpuffyRealm/viewstory.php?sid=31931
Summary:A year after the Hellmouth collapsed, Buffy and co., who now reside in London, are faced with an interesting mission. They must retrieve an artifact, however, this one was destroyed over a hundred years ago. In order to retrieve it, she and her watcher must travel back in time to the late 1800's, to the precise location where William lived before he was turned. Will she risk changing history to seek out the one she loves or will she be put in a completely different situation than she'd anticipated in the first place? (A slightly lighter fare than I usually write, though you should anticipate some angst, because it's me after all.


I can not express how much I love this story.

Third place for best well written NC-17 fic goes to Niahm With her Origin Series every storie will keep you riveted and on the edge of your seat. Though the angst is not so much between Buffy and Spike there's plenty of it to go around. Great love scenes and incredibly well thought out plot lines, this is a page turner. The first storie is titled simply Origins http://spikeluver.com/SpuffyRealm/viewstory.php?sid=6300

Followed by Origins: Revelations and Origins: Revolutions

Hope these help,

Angelinasway

Aloha My Love by Isabel
Summary: Some summer fun to cure winter blues. After Buffy suffered a nasty knee injury on the job, her friends think it would be nice to pay for her to take a little vacation. The problem is, all of her friends are too busy to go with her, except Spike. But what would a vampire do in sunny Maui for two weeks? Heat things up, what else.

Dark Prophecy by Pipergirl
Summary: Buffy and Spike must put aside their differences to find a baby whose sacrifice will bring about an apocalypse (yep--another one). This will be an adventure that will test their mettle and help them learn about each other and--most importantly--about themselves. A Slayer who's afraid of flying, a vampire who's afraid of... well, he just won't say, and a few really colourful characters will hopefully keep you entertained.

Just a Fling by MadRog
Summary: Dracula has woken up the slayer's dark, sensual side, and she decides to explore that side of sex for herself. Who better than to help her? Spike of course. This is a fun, sexy romp of 5th season Spike and Buffy. Evilawyer calls it PW1/2P. Bloodplay.
*This one is a permanent WIP, but ends in a good enough place and is still an excellent read.*

It All Started With Sex by Kari Mouke
It all started with sex. Riley did it badly. He knew it. They argued. Supposedly about Angel. Buffy said something she shouldn't. Not being who she was. Not being over a Hellmouth. Poof. Sex. Really, really good sex. NC17. Hard Spuffy. Season four. No Chip. Spike never returned to Sunnydale after Lover's Walk.

I have several:


Crave and Older by Nautibitz, you have to go to her website for it

Corruptions by damperandspoons--starts right off by the UST is still amazing

Room with a View Behind Blue Eyes

Nauti's fanfic site:

http://www.nautibitz.com/fic/

Her stuff is always great (as the name would indicate) my fave is Don't Stop, however there's not a lot of plot before the dirty gets started. I still recommend you check that one out, though!

Corruptions link:

http://dark-solace.org/elysian/search.php

Room with a view:

http://spikeluver.com/SpuffyRealm/viewstory.php?sid=36312&warning=NC-17

It's only available on her journal but I'd still rec None Other Than You by Tibialisant especially for the UST component.

Summary would be post-series. Buffy is living in LA and engaged - occasional slaying but it's not her life anymore. Then it all comes falling down.

Probably should be NC17, but I think she rates it R. Lotsa UST and a great scary story to boot. When Tibi gets to 'the business' it'll raise your eyebrows Great characters, great banter and a really original story.

Ooh, I second None Other Than You by Tibialisant . Great read.