Tony awoke to find himself in the bed of two super soldiers.
They were both awake too so there was no chance of slinking back out before either of them even knew he was there in the first place, which would have been Tony’s first choice, “Before you decide to murder me, please let me explain…”

Tony gets hurt at the end of a fight with Doctor Doom, knees are definitely supposed to bend the other way. Steve and Bucky just want to take care of him and he's not getting out of medical this time but he's locked himself in his bathroom. How they find Tony is not at all what they were expecting though.

A magic spell aimed at Steve hits Tony too—but everything's fine!

Until Steve starts thinking lustful thoughts about his boyfriend, Bucky, and Tony can hear them.

Cue awkwardness (Steve), science (Tony), and scheming while being a shit (Bucky).

It's Christmastime and the perfect time for Steve to admit that he's ready to move from "booty call" to "boyfriend" with Bucky, the perfect time for Bucky to admit he is probably sort of in love with Steve, and the perfect time for them both to finally tell Tony that they definitely aren't joking with all the innuendos and dirty jokes and not-subtle flirting.

There are secret santa shenanigans, mistletoe kisses, ugly christmas sweaters and of course, all the sexy times that comes with Stuckony falling in love.

Pure holiday fluff with our favorite OT3

A question at an interview leads to Steve and Bucky discovering fan fiction, and after piles of coffeeshop au's and fake dating tropes (and screaming over ABO fics) they find an author that writes some of the best fics they've ever read-- reader inserts starring a dark haired, dark eyed male reader as their shared love interest.

The platonic fics are heartfelt and sweet, the smutty fics have them tearing their clothes off to act out scenes, the soulmate fics have them crying over the true love that so often ends with the Reader passing away and Stucky being left behind.

Then one day, a fic posts with a scene taken right out of their lives, one that happened right there in the Tower, entirely the same right up until they take the Reader to bed.

Bucky is the one to realize the writer is Tony.

Steve is the one to suggest writing fics of their own to show Tony they return his feelings.

Writing fics to show an author you're in love? What could possibly go wrong?

Manchurian Candidate,” Tony sighs out softly as Bucky comes bustling over, scaring away the woman he’d been in the process of charming, both in an attempt to get her to donate more and in the hopes to have some fun later on after the gala was finished up. “You and Cap really need to stop doing this.”

The hands of fate must have been having a laugh when they’ve finally fulfilled Tony’s wish. That or they were all pissed drunk with Loki because what other deity could have cursed Tony to such a fate: soulmate to none other than Captain America himself.

He truly wants to blame Loki for this awful luck.

So many people in the universe. Eight billion alone on Earth and yet none of them could have been Tony’s soulmate. Nope. It had to be Steve Rogers, who is already bonded to his dead best friend, James ‘Bucky’ Barnes.

Because when I mentioned on tumblr that I was considering writing smut, two of the responses were requests for an A/B/O AU and, I quote, "Ot3 smut with Steve and Bucky double teaming Tony the right way."

Finally home after getting discharged with a brand new arm, Bucky’s glad to be back home, with Steve there like it’s always been. He needs to keep busy though, and meets up with some Black Ops acquaintances, Barton and Romanoff, for a position with their Private Security company. There are rumors that someone is stealing, and producing, Stark Industries weapons, and selling them to the enemy, and they have a lead on who’s doing it.

No one has seen Anthony Stark for years since his return from being kidnapped in Afghanistan. He quickly shut down weapons manufacturing, and started working on armor for their troops, advancements in medicine, and enhanced prosthetics for returning military members.

Bucky hadn’t been expecting to hear that Steve was working for Stark industries now, but he’s not complaining when he goes to meet his best friend for lunch, and runs into Tony Carbonell. Who incidentally was the one who built his new metal arm. But why does Tony end up in the middle of his job to find a traitor? He hadn’t expected things to turn this quickly.

When Steve is killed on the courthouse steps, Tony cannot handle the truth of his own betrayal.

He has to fix his mess.

He just has to make this right

Ten years ago, Tony had a summer romance on an archaeological dig that... did not end well. Now that he’s trying to sort out the company after Howard’s death, he sees a request from the dig site, requesting a Stark presence to approve additional funding. Pepper thinks it’s a good idea, so Tony goes back. Only, like so many other things in his life, it doesn’t go according to plan.

Or, how Tony falls in love again then finds out that his new guy is best friends with the old one, and somehow he ends up with both of them.

Inspired by Buried by NotEvenCloseToStraight.

“You’ve got war in your heart boy,” Howard sneers, “don’t ever try and pretend to be anything but what you are.”

Tony feels the familiar burn of a flower mark being etched into his skin but he doesn’t look, doesn’t try and check to see what it is. Instead he keeps his eyes on Howard and his hands cupped around his bleeding mouth and nose.

Bucky cleared his throat, “you never told me he felt like that about you.”

Steve’s brow wrinkled, “like what?”

Bucky rolled his eyes, “don’t be stupid, Stevie.”

Steve/Tony/Bucky. Goes AU post-Winter Soldier. Not compliant with Age of Ultron in any of the subsequent films.

Me through Him to You:
“You’re sick, you need someone to look after you. This mission could take a couple of days, and I want you in one piece when I get home.”
Tony sighed. “Why do you care?”
Steve’s mouth twisted unhappily. “I hope that’s the fever talking.” He stepped closer. “When I get home,” he said, so quietly that Tony didn’t think even the nosiest of their nosy friends could hear it, “we’re going to talk, all right? Until then, please let Bucky look after you. Consider it me looking after you, through him.”

Bed of Nails:
Bucky, Steve, and Tony have settled into domestic bliss. Things aren't perfect, but they're happy.
Until, that is, someone decides that Tony is missing crucial information involving his parents, the Winter Soldier, and a fateful night in December 1991.

Three Days, One Week, and a Lifetime:
Bucky and Steve work at a coffee shop. Tony meets them when they actually make his insanely caffeinated order. Sparks fly and pants drop. 50% Actual Porn, 40% Schmoop, 10% clothes & coffee porn.

When Bucky Barnes comes back to Steve Rogers healthy and going through his recovery nicely, he never expected to find Steve in a relationship with Tony Stark. But he's not going to be the one to ever get between Steve and whoever makes him happy, and if that person is Tony Stark, then so be it.

If there isn't a place for Bucky between Steve and Tony, there's nothing he can do.

Although... maybe there is a place for him after all.

A dark-haired man crouches over Stark, brushing back her hair, gently caressing her cheek, cradling her head in his lap. A man with a metal arm and a sniper rifle slung over his back. A familiar man, he realizes, and the world crumbles as Bucky Barnes stares furiously at him, torn between absolute rage and utter joy.

The Asset was sent in to kill Tony Stark before Project insight. Tony Stark is a klutzy mess. The Asset--Bucky--didn't stand a chance.