If you'd asked Sting earlier what his weekend plans were, he probably wouldn't have answered with getting fucked over the couch by his roommate's boyfriend. Yet here he was, bent over and groaning as Gray pulled his hair.

It had started innocently enough. Natsu had become flirtier than usual, although that wasn't too out of character for him. Then Gray had started making suggestive comments, and when Rogue had caught him wandering around the apartment once in just his underwear, Gray had just grinned and winked.

Rogue and Sting had also found themselves walking in on Gray and Natsu making out more and more often, to the point where Sting just kind of expected to see them with their tongues down each other's throats when he opened the front door. What he didn't expect was for him and Rogue to come back from a movie on Friday night to find Natsu riding Gray on the sofa.

"Um," Sting said, freezing with one shoe off and his hand on the wall. The couch faced the far wall and Natsu stared at Sting as he groaned and tugged on Gray's hair. "We, uh..." Sting glanced back at Rogue, who was gazing at Natsu with pink cheeks.

"T-told you," Natsu groaned, leaning down and biting Gray's neck. "Perfect... ahh, timing."

"Wh..." Sting trailed off, unable to take his eyes off the curve of Natsu's shoulders and the way sweaty strands of hair stuck to his dark skin. Of course he was attracted to his roommate – who wouldn't be? And it wasn't as if Rogue didn't know it; he wasn't the jealous type.

"There's plenty of r-room on the couch," Gray said, leaning his head back and moaning as Natsu pressed kisses across his throat. "If you... aah, wanted to join in."

Join...in? Rogue's eyes widened and he looked at Sting, not with revulsion, but with interest.

"What... do..." Sting floundered. The sounds of Natsu and Gray groaning and moving against each other were making Sting feel incredibly uncomfortable in his already-tight jeans. He couldn't deny it wasn't something he'd thought about before. He and Rogue had even talked about it, but it had always been just a fantasy.

"Do you..." Sting looked at Rogue, glancing down at his boyfriend's pants and realizing that Rogue was having the same problem. Behind him, Natsu's moaning was getting louder, interspersed with curses and Gray's name. And then—

"St-sting," Natsu gasped, dropping his head to rest on Gray's collarbone. "R-rogue, fuck, p-please." Both boys flushed darkly and Sting felt any semblance of apprehension he'd previously had fade away as he grabbed Rogue's wrist and dragged him over to the couch.

"Better," Natsu whispered, reaching out for Sting.

"Fuck," Sting whispered as Natsu dragged him down into a kiss. He moaned, letting go of Rogue's hand and fisting his fingers in Natsu's pink hair as Natsu bit down on his lower lip. "Wh-"

"Talk later," Gray panted, leaning back and grabbing Rogue's arm, then pulling Rogue forward to kiss him upside down. Rogue returned the kiss enthusiastically, running his fingers up Gray's jaw. "You both okay with this?" Gray's fingers travelled to the buttons of Rogue's shirt and played with them while waiting for an answer.

"Yeah," Rogue breathed, at the same time that Sting moaned an enthusiastic yes into Natsu's mouth.

"Good," Gray said, tugging on the buttoned shirt. "Get your ass over here."

Rogue complied immediately, shedding his button-down and shirt as he moved around and knelt down on the couch next to Gray. Gray pulled him in against for a kiss, hard and sloppy as he thrust up into Natsu. Rogue's hands hesitated for a moment, then one came up to Gray's hair and the other to drift down Natsu's hip.

Gray moved his lips down to Rogue's neck, biting and sucking at his skin as he brought a hand down to Rogue's jeans, undoing the button and tugging at them. "Off," he murmured, panting as Natsu ground down on him. Natsu was still kissing Sting, who was still leaning over the back of the couch. Rogue shuffled out of his pants as quickly as he could, kicking them to the floor and then moaning as Gray wrapped a hand around his cock.

"Fuck," he whispered, fingers tightening on Natsu's hip. Gray hummed and moved up to kiss him for a moment, then leaned over and nudged Natsu out of the way take over kissing Sting. Rogue whimpered as Natsu turned to him, pulling him in and pressing their lips together. He could taste Sting's cinnamon gum on Natsu's lips, but Natsu felt so different.

"Sting's wearing too many clothes," Natsu said after a moment, pulling away from Rogue and reaching up to grab the hem of Sting's shirt. "C'mere."

Natsu slid off of Gray with a soft oof as Sting came around to the front of the couch. Gray turned to Rogue and pushed him down on the couch, straddling his hips and leaning down to kiss him. Natsu stood up and helped Sting tug his shirt over his head.

"Okay?" Natsu asked, rubbing his thumbs over Sting's nipples and following his gaze to where Gray had Rogue pinned to the couch and was kissing him, grinding their cocks together between them. "We can stop if—"

"No," Sting breathed, exhaling sharply as Natsu pinched at his nipples again. "'s fuckin' hot as hell." Natsu hummed in agreement, leaning down and replacing his fingers with his lips. Sting groaned, trailing his fingers down Natsu's back to grab his ass.

"I've been thinkin' bout this for a while," Natsu breathed, standing up again and reaching for the button on Sting's jeans. "Don't think I haven't seen you staring at my ass." Sting flushed, then growled and pulled Natsu in for a messy kiss as Natsu shoved his pants down.

When Natsu dropped to his knees and started sucking his cock, Sting was convinced he was dreaming. Fuck, Natsu was good at this. Sting gripped Natsu's hair tightly, feeling off-kilter as he watched Gray spread Rogue's legs and start to kiss his thighs and stomach. Rogue's head was thrown back and his cheeks were flushed, and Sting couldn't imagine anything sexier.

"You... this..." Sting cursed as Natsu took him in until his nose pressed against Sting's stomach. Natsu's fingers ran up and down Sting's thighs, mirroring Gray's movements on Rogue. "Shit, f-fuck..."

"He's good at that, hey?" Gray broke the kiss and turned around, giving Natsu a fond look before tugging Rogue up and pulling him toward Sting. Rogue reached out for Sting and pulled him in for a kiss, tasting like spearmint with a faint hint of Gray's cigarette smoke.

Natsu moved one hand to Rogue's thigh, pulling him in so he was standing next to Sting and then sliding off Sting's cock and onto Rogue's. Rogue groaned, digging his nails into Sting's shoulder as he panted and ran a hand through Natsu's hair.

"How far do you wanna take this?" Gray moved behind Sting, running his hands up the blonde man's chest and kissing the back of his neck. He thrust his cock up against Sting's ass, gripping his hips and pulling Sting tighter against him. "You can say 'no' anytime."

"Fuck," Sting breathed, jerking slightly as Natsu moved back over to him for a few seconds, then returned to Rogue, who exhaled shakily and thrust his hips forward. "I want..." Sting turned to Rogue. "What's... aah, fuck... what's okay with y-you?" Rogue pulled him in and kissed him, then reached out to Gray. He grabbed a fistful of Gray's hair and turned to kiss him again, and the sound of the two of them panting into each other's mouths over Sting's shoulder had him nearly coming right then.

"I wanna watch him fuck you," Rogue breathed as he let go of Gray. Sting groaned, stroking Natsu's hair, who had moved over to him again. Talking about this in the privacy of their bedroom, when it had just been a fantasy – that was one thing. Now that they were in the middle of it, with Natsu sucking his cock and Gray running a gentle finger over his entrance, he realized that his fantasies were nothing compared to the real thing.

"Bend over the couch," Gray murmured in Sting's ear, nudging his hips toward the armrest. Sting's heart was beating so hard he felt like he was going to die as Natsu moved off him and he leaned over the arm of the couch, spreading his legs and resting his hands on the cushion. He groaned as he felt wet fingers sliding across him, and gasped as Gray pressed inside. "Fuck, you're tight," Gray murmured, leaning over and wrapping an arm around Sting's chest. "Been a while?"

Sting could only moan in response, pushing his hips backward as Gray added another finger and began rubbing his thumb over Sting's nipples.

"How 'bout you?" Natsu asked Rogue, standing up and pulling the dark-haired man toward him. He kissed Rogue roughly, biting down on his lip and digging his fingers into Rogue's hips. Rogue responded in kind, pulling on Natsu's hair until Natsu gasped and pulled back. "Wanna fuck me?"

"Hell yes," Rogue growled, pushing Natsu onto the couch until he was lying on his back on the cushions, nearly underneath Sting, whose knees were pressed against the armrest.

"Mm, good idea," Natsu murmured, pushing himself further back until his head touched the arm of the couch and he could take Sting's cock into his mouth again. Sting gasped, bucking his hips forward, then pushing back again onto Gray's fingers. Oh, gods.

"Here." Gray tossed Rogue a condom, then returned to kissing Sting's back and shoulders while stretching him open. "We're both clean, but use it this time."

This time, Sting thought through the haze of pleasure. They want to do it again.

Rogue nodded and tore the package open, rolling the condom on and then leaning over Natsu. He slid two fingers into Natsu, who moaned and pulled off Sting's cock.

"Nggghh I'm already good from... ahh, from Gray," Natsu groaned, reaching up and running his fingers through Rogue's hair. "C'mon." He nudged Rogue with his knee, urging him forward and then arching his back and crying out when Rogue pushed into him. "F-fuck, ahh... shit that's good." Rogue rocked his hips back and thrust forward again, groaning and digging his fingers into Natsu's thighs.

"You ready?" Gray asked, continuing to kiss Sting's neck and thrust his fingers in an out. "'cause fuck, I am..." Sting nodded, exhaling sharply when Gray removed his fingers and then slowly pushed his cock inside Sting instead.

"Fucking hell," Gray whispered, wrapping his hands around Sting's hips and thrusting hard. Sting gasped, biting his lip. "He's tighter than you, babe." Natsu didn't reply, just made an incoherent noise as Rogue rocked into him over and over.

Sting felt breathless, bracing his hands on either side of Natsu's chest and tensing at each thrust of Gray's hips. It felt different from Rogue – rougher, but still amazing. When Sting looked up, Rogue's face was inches from his, and Sting grabbed the back of Rogue's neck and pulled him in for a sloppy kiss.

"This is... ahhh, fuck," Rogue gasped against Sting's lips, grabbing Natsu's thighs tighter. Sting groaned in agreement, then broke the kiss to lean down and take Natsu's cock into his mouth.

"Shiiiit," Natsu cried out, pushing himself up on his elbow and returning the favor. Natsu's mouth was so hot, and with Gray pounding into him from behind, Sting knew he was almost at his peak. He took Natsu as deep as he could, pulling back and sucking hard on the head.

"Sting, I'm..." Gray ground out, reaching down and grabbing Sting's hair. The sharp pain caused Sting to groan around Natsu's cock and then Natsu was shouting, fisting the fabric of the couch and spilling onto Sting's tongue. Rogue followed seconds later, thrusting hard and panting heavily as he shuddered and dug his nails into Natsu's thighs.

"C'mon, Gray," Natsu whispered, reaching up around Sting to touch Gray's hip as Sting swallowed and shuddered. "C'mon love, come for me."

"Fuuuck," Gray cursed, then let out a long, low moan as he slammed his hips into Sting's ass. Natsu returned his lips to Sting's cock and that was all it took for Sting to come, grasping Rogue's shoulders and kissing him messily as Natsu swallowed him down.

Sting collapsed forward on his forearms, nearly squishing Natsu, who slid out of the way. Sting took several deep breaths and then sat up shakily, leaning on Rogue, and Natsu immediately flopped onto his lap. Gray slid onto the floor in front of Rogue's legs, leaning his head back and humming as Rogue ran fingers through his hair.

A comfortable silence descended over the four of them as their breathing and heartrates all slowly returned to normal. Natsu lay face-up across Sting's lap and Sting brushed sweaty strands of pink hair out of his face, making gentle eye contact that was surprisingly not awkward.

Eventually Gray broke the silence as he pressed back into Rogue's gentle fingers in his hair. "That was..."

"Yeah," Sting breathed, leaning back into the couch. "How long've you two been planning this?" Natsu had the decency to look sheepish.

"Like... a couple months?" He looked over at Gray who had reached over and grabbed his hand. "We thought maybe the, uh, the flirting and the making out would clue you in." Sting groaned, shaking his head. "So, y'know... drastic measures."

"Huh," Rogue said, still slightly out of breath. "Well. Good."

Natsu laughed, tipping his head back to look at Rogue. "Speechless, huh?" he teased, running a hand up Rogue's arm. "Gray usually is too when he's done with me."

"Shut the fuck up," Gray grumbled, humming happily as Rogue's fingers combed through his hair. "Mmm, that feels nice." He glanced over at Natsu. "You never play with my hair, you asshole."

"Pfff," Natsu replied, making a soft noise as Sting's hand moved down his side and back up again. "I do, you just fall asleep right away 'cause you're a hundred." Sting laughed, shaking his head. The familiar banter between the two of them was reassuring, like they didn't just break a hundred rules and irreparably destroy their friendship for a bit of fun.

Another silence filled the air, this one a little less comfortable, a little less certain.

"Do you—"

"Is this—"

Natsu and Sting started talking at the same time, but Sting shook his head, gesturing for Natsu to go ahead.

"You guys tired? Or you wanna watch a movie or something?" He shifted uncomfortably. "Either way I need a blanket or clothes, it's fuckin' cold in here." Sting hummed in agreement, looking over at Rogue. Should they just pretend that everything was normal? Or—

"It doesn't have to be weird." Gray interrupted Sting's racing thoughts and when he looked up, Gray was gazing at him intently. "We all enjoyed it, we – I mean me and Natsu – want to do it again." Sting felt his cheeks flush, warmth creeping up through his chest and neck. "Do you?"

"Yes," Rogue replied immediately, running his fingernails over Gray's scalp. Gray moaned and tipped his head back, closing his eyes. "I - we...?" He looked at Sting, raising his eyebrows in a silent question. Sting swallowed, trying to sort out his feelings. Out of everything that was racing through his mind, the most obvious things were contentment and... trust.

"Yeah," he said softly, leaning over to kiss Rogue. It was soft and sweet, nothing like earlier, and Sting leaned his forehead against Rogue's for a moment. They would have to talk, later, but this felt... right. "Yeah, we do."

"Awesome," Natsu said, yawning and turning to kiss Sting's stomach. "I need PJs. What time is it, anyway?"

Gray squinted at the clock on the stove. "Almost one?" Natsu groaned, rubbing his face.

"I gotta be at work at six," he grumbled, pushing himself up off Sting's lap. "Bedtime, then?" He shot a look at Gray, who shrugged his shoulders and nodded his head at Sting and Rogue. "Do, uh... you guys wanna sleep with us?" Sting raised an eyebrow and Natsu rolled his eyes. "Not like that, dumbass. Bed."

"Uh..." Sting looked over at Rogue, who nodded. "Yeah? S-sure?"

"Are we all gonna fit on there?" Gray asked, pushing himself to his feet and grabbing Natsu to pull him up from the couch. "I know it's a king but still."

"We'll make it work," Natsu insisted, kissing Gray's nose and heading toward the bedroom. "C'mon, you two. I'm tired."

Sting and Rogue sat on the couch for a minute after Gray and Natsu had left, looking at each other with slightly stunned expressions. Sting grabbed Rogue's hand and twined their fingers together as Rogue stood and tugged Sting toward their room.

"Did that... actually just happen?" Sting asked, although the slight ache in his ass told him that yes, it had. "Did we... fuck our roommates?"

"Mm," Rogue replied, opening the door to their room and heading over to the dresser, then tossing a pair of sweatpants at Sting. Sting pulled them on, running a hand through his hair and shaking his head a little in disbelief. "You okay?" Rogue asked, coming up and kissing his cheek.

"Y-yeah," Sting said, wrapping an arm around Rogue's waist. "Surprisingly? Yes?" He exhaled, turning to bury his face in Rogue's neck. "Are we... okay?"

"Of course," Rogue murmured, pressing a kiss to Sting's hair. "We've talked about it before, love." Sting made a soft noise. They had – neither of them were into the idea of an open relationship, but having fun with their roommates had been something they'd discussed. "You wanna stay here tonight instead?"

"No," Sting said, pulling back and kissing Rogue on the cheek. "Let's go cuddle."

Natsu and Gray's room was similar to theirs, except their bed was a king instead of a queen. Gray insisted that it was because Natsu gave off too much body heat and he needed to get away from the clingy cuddling in the middle of the night. Natsu always pouted at that and insisted it wasn't true.

"C'mere, you two," Natsu said. He was already in bed, looking half asleep. Sting slipped under the covers hesitantly, sliding over until he was nearly nose-to-nose with Natsu. Rogue moved around to the other side and wrapped an arm around Natsu's waist, snuggling up to his back. Natsu mumbled happily and reached out to pull Sting closer to him.

"Good?" Gray asked, appearing from the bathroom in nothing but a pair of boxers. Sting looked up and nodded, and Gray slid in behind him, tucking one arm under the pillow and wrapping the other around Sting's waist. Rogue reached down and tugged the blanket up over all of them, and Sting sighed happily as he felt Gray press a kiss to the back of his neck, then tuck a knee between Sting's legs. Gray's hand made gentle circles over Sting's stomach and Sting hummed softly.

Natsu tipped his head up and kissed Sting gently, fingers touching Sting's cheek and then running through his hair. "Night," he murmured, taking Sting's hand and holding it in his. Rogue reached over and ran his fingers over Sting's arm, then snuggled up closer to Natsu's back and yawned.

"Night," Sting replied, closing his eyes and feeling himself start to drift off. The last thing he remembered before falling asleep was the comfortable weight of everyone around him, and the gentle sensation of Gray's lips on his neck.