"Mnmmmm," Natsu couldn't remember what he had been dreaming about, but the feeling of Gray pressing soft kisses down his chest banished any thoughts of sleep from his mind. He opened his eyes and looked down at his boyfriend, smiling as Gray met his eyes and grinned.
"Morning," Gray murmured, drawing his tongue down over Natsu's hipbone and grinning up at him. Natsu made a soft noise of pleasure, reaching out and running his fingers through Gray's hair. "Sleep okay?"
"Hmmm," Natsu replied, wiggling his hips. Gray laughed softly, placing a soft kiss on Natsu's stomach and dragging his teeth down to the junction where his thigh met his groin. Natsu was hard already – had been since before he woke up – but Gray ignored that and instead raised Natsu's leg up, kissing down and across to the other thigh. "Ngh… you're a tease."
"Oh I'm sorry, is this what you wanted?" Gray moved up and ran his tongue along the underside of Natsu's cock.
"Ahhh… mmm, Gray…" Natsu threw his head back and fisted his hand in the sheets as Gray took his cock deep into his mouth. Gray hummed around him, sliding up and down and swirling his tongue around Natsu's cock in heart-stopping ways. "Shiiit." Natsu unconsciously jerked upward, groaning at the sensation. Gray grabbed Natsu's hips and continued to take Natsu into his mouth, sliding his cock almost all the way out only to dive back down again. Natsu cursed and grasped at Gray's shoulders, leaving crescent-shaped marks in his skin as he gasped and moaned, biting his own arm to stifle the sounds.
"You don't have to be quiet," Gray purred, removing his mouth and tracing lazy swirls around Natsu's shaft with his tongue. "Sting got Freed to put in soundproofing runes. They can't hear you." Natsu let his hand drop and groaned. "Although I have a feeling that you'd like it if they could."
"Holy hell," Natsu breathed, cheeks flaming with embarrassment and desire. The thought alone sent heat flaring through his stomach.
"Hmm, looks like I was right." Gray's hand moved to the base of Natsu's cock and down over his balls, palming them gently. He trailed downwards, grabbing Natsu's ass and squeezing hard, making a soft noise of appreciation. "And you call me a pervert." Trailing kisses up the firm chest below him, Gray made his way to Natsu's mouth and captured it in a fierce kiss. Natsu moaned, feeling Gray's hardness pressed tightly against his own. "Does the idea that they could be in the next room, listening to you moan, turn you on?"
"Gods… damnit," Natsu grunted, running his hands up Gray's body and grasping his hair. Gray laughed softly, pressing kisses down Natsu's jaw until he reached Natsu's throat, where he bit down hard. "G-GRAY!" Natsu shouted in surprise, shuddering as Gray ran his tongue gently over the mark.
"I believe that yesterday you insinuated that you wanted me to fuck you," Gray whispered in Natsu's ear. "Or was I mistaken?" Natsu swore loudly, raking his fingers down Gray's back. When had Gray become this forward? Natsu found he didn't care where it came from – he liked it.
"Please," he begged as Gray reached over to the nightstand, and popped the lid off something. A second later, Natsu felt a set of wet, warm fingers circling his ass. "Ah… mnnn…" He bit Gray's lip, moaning as Gray shifted forward and rubbed their cocks together again.
"Please what?" Gray asked seductively, circling his finger tantalizingly around Natsu's entrance while he pressed kisses to the Natsu's collarbone. Natsu's breath was coming out in short, sharp pants now, and his fingers were tangled in Gray's hair. "You have to tell me what you want."
"F-f-fuck me," Natsu panted, arching his back. "I… I w-want you… i-in-inside m-me." Gray growled then, low and feral, and the sound went straight to the base of Natsu's spine. He pressed himself down toward Gray's hand at the same time that Grey pushed in, and Natsu cried out in a mix of pleasure and mild discomfort as one of Gray's fingers slipped inside him. Gray kissed Natsu messily, all teeth and heat and wetness.
"Fuck…" Gray breathed, sliding his finger in and out slowly, getting Natsu used to the sensation. Natsu's face was twisted in pleasure, hair sweaty and spread on the blanket beneath him, and Gray swore he'd never seen anything more beautiful.
"More," Natsu growled, spreading his legs wider and digging his nails into Gray's lower back.
"I don't wanna hu—"
"Did I hurt you last night?" Natsu's voice was shaky as he ground himself against Gray's hand, and Gray shook his head. It had been mildly uncomfortable at first, but Natsu had been made it feel so good that Gray hadn't had time to contemplate anything but the fire spreading through his body. "Then more."
"As you wish," Gray whispered, slipping a second finger inside and spreading them apart. Natsu shouted, slamming his head backward into the bed and arching his back. Gray wasted no time adding a third, leaning back down and taking Natsu's cock into his mouth again while he did it. The sounds coming from Natsu's mouth were obscene, and Gray thought he might come just from listening to him pant and moan.
"P-please," Natsu groaned after a minute, and Gray grunted in acknowledgement, slowly removing his fingers and leaning up to kiss his boyfriend. This kiss wasn't a battle, just a lazy tangle of tongues and lips and whispered curses as Gray pressed his cock against Natsu's entrance.
"Ready?" he asked. Natsu let out a shuddering breath and nodded, pulling Gray's hips towards him. Gray groaned as he felt the head of his cock slip slowly inside Natsu.
"Holy shit," Gray whispered, eyes screwed shut in pleasure. He tried his best to go slowly, refraining from slamming his hips forward. "You okay?" Natsu's face was a mix of pleasure and pain, and Gray leaned down and kissed his forehead gently, stroking his cheek. "I can stop if you—"
"Don't you fucking dare," Natsu replied, lifting up a leg and placing his heel on Gray's back, encouraging him further forward. They both swore in unison as Gray slid the rest of the way inside, stopping only when his hips hit the back of Natsu's thighs.
"Y-you are really f-fucking… tight," Gray stuttered, leaning heavily on one arm and gasping. Natsu laughed a little, breathing slowly to get used to the feeling. He reached up and ran a hand through Gray's hair, smiling gently.
"Move." The whispered encouragement was all Gray needed to cant his hips backwards, sliding out and then pushing back into Natsu. His breath stuttered as a heat flooded through him, and he couldn't help the moan that escaped from his lips. He was really glad for those runes right about now.
"Gnnnnnghhhnnnatsu…" Each thrust ran a thrill through his body, pooling a warm heat in his belly. Natsu panted and exhaled sharply each time Gray entered him, and Gray reached up to grab his hand, entwining their fingers.
"Oh… gods… G-g-gray," Natsu's voice was high and breathy, and he wrapped his free hand around Gray's hip, guiding his thrusts until suddenly Gray hit something inside of him that made him see stars. "FUCK!" Natsu shifted slightly, aiming for the same spot again, and shouted out as his body began to tremble.
"N-natsu, f-f-fuuuuck," Gray slammed his hips forward, driving in and out of Natsu, grunting loudly with each thrust. He could feel a pressure building, and it intensified as Natsu shouted out in pleasure. Gray reached down and wrapped his hand around Natsu's cock, stroking it erratically. "G… g… gonna c-come…" Natsu growled and pulled him in harder.
"M-me t-t-nnnggggahhhh!" Natsu dug his fingers into Gray's hips as he came, shouting Gray's name. His vision went dark as the fullness of Gray inside him combined with the familiar feeling of release, intensifying everything until he felt like he might pass out. The sensation of Natsu clenching around him undid Gray and he cried out, feeling his orgasm shudder through his body from his toes all the way to the top of his head.
"Natsu," he whispered, collapsing over his boyfriend, panting and shaking. "Holy shit, you're amazing." Natsu breathed out a shaky laugh, noting the role reversal from the night before. He pressed a kiss to Gray's jaw and pulled Gray down on top of him, wincing slightly as Gray slid out of him.
"You made a mess," he teased, reaching over to grab a shirt and half-heartedly wiping up himself and the bed between them. Gray mumbled something in response, then grabbed Natsu around the waist and dragged him back to the top of the bed. Natsu rolled to face away from Gray, who pulled Natsu into his arms and nuzzled the back of his neck.
"That was amazing," Gray whispered softly, tightening his arms around Natsu's chest. "Thank you for trusting me." Natsu smiled, turning his face to kiss Gray's cheek. Gray was still trembling.
"I've always trusted you," Natsu murmured. He couldn't even find the energy to insult Gray, who apparently felt the same way. "We're gonna have to thank Sting for those runes." Gray snorted.
"I think he heard your fucking is better than fighting comment the other day." Natsu grinned, nipping at Gray's jaw.
"It's true." He wriggled further backward into Gray and pulled the blankets up over them, reveling in the soft warmth. "I mean, I do love fighting you. But… you inside me… mmm." Gray made a soft, sleepy sound of agreement. "Hey, don't fall asleep, you told Rogue you'd make him pancakes." Gray groaned.
"He can make his own damn pancakes," he grumbled. "I'm warm."
"Don't pretend you're gonna disappoint him," Natsu laughed, "you can't say no to him and his puppy eyes." Gray huffed.
"Fine," he yawned, burying his face in the back of Natsu's neck. "Just five more minutes."
"Five more… minutes," Natsu agreed, snuggling up to Gray and promptly falling asleep.