Disclaimer: I don't own Naruto, or any of its associated characters!

Summary: Naruto is hit with a jutsu that causes uncontrollable lust. Someone has to step up to satiate it...no need to ask around. Sasuke's already volunteered. Canonverse, Sasunaru/Narusasu. PWP, with just enough plot for multiple chapters. Plotline is three chapters, plus one bonus - new chapter every day until they're all posted!

A/N: Underage readers, avast ye! This be for mature eyes only!

The Jutsu

Chapter 1: The Cure

"It's…complicated." The blonde haired woman sighed, massaging her temples.

"Just tell us, Tsunade-shisho," Sakura sounded as exhausted as Sasuke felt—and just as impatient.

"Kakashi is stable. You did well, Sakura," Sakura only nodded, unable to feel the happiness the praise would have normally brought her, only overcome with relief at Kakashi's state and worry for Naruto's, "and Naruto will be okay. He is…under the influence of a certain jutsu at the moment."

"Controlled?" Sasuke narrowed his eyes.

"Yes, in a way, but also no—it's…ah," Tsunade sighed quietly to herself, "it's an insidious jutsu. I won't tell you what it's used for; I'm sure you can guess yourselves, but…"

Shuffling the papers on her desk, she muttered to herself until she found what she was looking for.

"…the jutsu—no, let's see here…ah! Here…the affected persons find themselves in an uncontrollable state, wherein their usual disposition is replaced by a unidimensional aggressive lust. These persons no longer feel needs for food or shelter, although those needs are still present, and do not exhibit any sexual preferences. They do not exhibit conscious thought, beyond their need for sexual activity. The affliction continues until the lust has been satiated. The effects have not been known to weaken with time."

The silence was thunderous.

"A-a sex jutsu?!" Sakura covered her hands with her mouth.

"A rape jutsu," Sasuke corrected, scowling fiercely.

Tsunade cleared her throat slightly. "Yes, well…at any rate, any doubt that this was the jutsu that hit Naruto disappeared when he awoke this morning."

"He's awake?" Sakura said.

"If you can call it that," she replied, and the light in Sakura's eyes dimmed.

"You can't heal it...?" Even as she said it, Sakura did not look hopeful.

"If it was anyone else, it would be much simpler," Tsunade sighed, "as it is, the jutsu is no simple illusion or injury. It's woven into their mind and chakra as, well, part of them," she motioned with her hands, "that, in itself, would be complicated, but do-able. However...Naruto has two sets of chakra, one of which the jutsu cannot get to properly, so it has moved to essentially encircle the seal. Any attempts to remove it now would..."

"You would risk damaging the seal." Of course, the dobe had to make everything complicated...

Tsunade nodded.

"It's still a possibility. We could bring Jiraiya in," she leaned back a little, "to assess the situation as well. He is familiar with the seal, and I'm sure, between the two of us, we could figure something out, but..."

"How is the lust to be 'satiated'?" Sasuke said, "if the idiot can just masturbate and be done with it, then—"

Sakura squeaked a little, and Tsunade shook her head. "He already tried that. Several times. He is currently chained to keep him from harming himself further."

"Harming himself?!" Sakura face was beet red.

"He was rather…vigorous," Tsunade looked extremely uncomfortable. Even Sasuke felt the heat rush to his cheeks at the mental images brought up by that statement.

She cleared her throat again. "It is likely that he needs a partner."

"We can—we can find him one," Sakura said, after a moment, "there are ninjas—there was training for—the—missions of seduction and things…like that," her voice became less confident as she spoke.

"That is true," Tsunade nodded, "there are ninjas who do—well, not this sort of thing, but similar…"

A mission to have sex with Naruto. Sasuke felt sick.

"I had hoped…" Tsunade said quietly, and then sighed.

"You had hoped?" Sasuke asked in a strained voice. His mind was going a thousand miles a minute and he could barely keep his face still… what had happened—and what would happen—to Naruto. If he had been but a second faster—but he had been stupid and distracted with getting Kakashi healed and the only one who had noticed the advancing ninja was Naruto—for once. The enemy had likely hoped to even out his odds of one against three. Sasuke wished he had killed the man more slowly.

"I—" Tsunade looked conflicted, "I am sad for him—that this had to happen this way. Not that I don't trust my other ninjas—but I had hoped…for Naruto…" her eyes wandered over to Sakura.

The pink haired girl's eyes widened and she took a step back, and it took her a moment to respond.

"You want me to sleep with him." She spoke softly, eyes firmly on the ground.

"I won't force anyone," she said, "obviously. Sakura."

"I—I'll have to think on this, Tsunade-shisho," she said.

Tsunade looked worried, but nodded. "We will discuss this again in the morning."

And with that, Sakura practically ran. Sasuke thought she might be crying.

There was no need for that. Sasuke had already made up his mind.

"Will he remember what occurs while he is under the influence of this jutsu?" Sasuke asked.

"There is no consensus. I read through a few reports—some say nothing, others say they remember…flashes, blurs…some say they remember everything. Any of them may have been lying."

Sasuke nodded. "Then it is for…peace of mind that you wish Naruto to lose his virginity to someone he considers a good friend?"

Tsunade winced a little at the phrasing, but nodded.

"I know it's not fair," she started, "but—"

"I will do it."

Tsunade's head snapped up.

"Tonight." He held her gaze with cold intensity. Not for the first time since Sasuke had come back to their village, she wondered what really went on in that odd mind of his—and how strong Naruto's grip on him truly was.

"Ah, I suppose there is no sexual preference," she muttered to herself, but Sasuke overheard.

"You do not know his sexual preference either," he snapped, and Tsunade's eyes flew back to his.

Oh. Oh, Sasuke…

As if reading her thoughts, Sasuke's glare intensified. Tsunade merely inclined her head with a careful, "true."

His glare softened, and he seemed to shake himself.

"Ah," in fact, he looked a bit nervous, "can he…can he be blindfolded?"

Tsunade's eyebrows rose.

"In case he does remember. He would—he would not be subtle about it, and our team dynamic would suffer." He raised his chin.

Well. Tsunade supposed there wasn't much harm in indulging him.

"Alright. Blindfold. Any other requests?"

"Ah," Sasuke looked nervous again.

"Actually," Tsunade said, feeling incredibly awkward, "just write down whatever you think you need and I will get it for you. Let's do it that way. Yes."

"Right," Sasuke said, taking the paper handed to him. As if he hadn't thought—fantasized—about it a million times, he pretended to take a few moments to consider what he would need—and to firmly tell himself that now was not the appropriate time to have an erection.

Naruto was, unsurprisingly, already naked. He made quite a sight sitting at full mast, hands chained to the floor. He could not see them, as with most of Konoha's cells – a simple illusion to have the guards able to see the prisoner but the prisoner unable to see the guards seemed to work wonders on the common criminal.

Naruto was panting and sweating, and didn't do much but beg as Tsunade spoke quietly and wrapped a soft cloth blindfold around his head.

She came out, and Sasuke fought to look calm.

"There you are. Here is your basket," it was covered, thankfully, but definitely contained more than what Sasuke had asked for. "There are—medicines and such in there as well, for pain, and…relaxation."

She looked back at the blonde. "I suggest you do not unlock the chains, both for your safety, and also because he will likely remove the blindfold. They are chakra restraints as well. Naruto's chakra unleashed like this could be…well. Anyways. You will have privacy: no one will be in this room. However," she indicated the basket, "there is a small scroll in the basket. Rip it, and it will let me know. If you are in danger, please do not hesitate to use it. If not, please use it after the two of you are finished, so we can continue monitoring Naruto's condition."

Sasuke gave a tight nod, inwardly scoffing at the idea of being in danger, but relieved that she had offered an alternative to guards monitoring them while they…

Tsunade cleared her throat. "Well," she looked at him, "thank you, Sasuke. Sakura will thank you as well, I'm sure."

"Don't tell her." He said immediately, panic flooding through him at the thought. "Do not say who."

Tsunade looked surprised. "Alright, if that's what you wish. I don't think she would think less of you, Sasuke-san."

Sasuke didn't reply.

"Alright," she clapped him on the shoulder and he froze and fought to not move away. "Don't have too much fun."

She gave him a soft smile, and then she was gone, and Sasuke was alone, with nothing but a door in between him and Naruto.

…a naked Naruto. A naked Naruto who was sweating and rubbing his back against the wall, grasping at the floor where his hands were bound to, arching back—

Sasuke practically flew into the room, nearly spilling the basket he was holding. He froze when Naruto's head spun towards him, in spite of being firmly blindfolded. Naruto pulled against the chains and sat up on his knees, going as high as the binds would let him. He probably would have crawled if he could have. Sasuke swallowed.

"Please," Naruto said—a breathless, whispering tone that Sasuke had never heard from him before.

"Please," he said again, drawing the word out with a whine. Sasuke set the basket down, opening it without looking into it.

Naruto looked—this was…it was a dream. Sasuke was rock hard from the moment he walked in—and if this was the only way he could have Naruto…

Well, he'd best make it count.

"Please what?" He waited just out of Naruto's reach.

"I—I want—" the blonde sat up on his knees and paused, waiting for Sasuke to lean closer before he lashed out against his binds, growling and pulling at them in a desperate attempt to get to the Uchiha. Sasuke smirked a little.

"Dobe," he breathed, moving closer as Naruto tilted his head up. His hips were inches away from Naruto's head and it was driving him wild, and yet he couldn't bring himself to touch the blonde—as if touching him would break this spell.

"I want," Naruto said, his hands grasping at the floor, "I need—you. I need you."

"You need me?" Sasuke said quietly. "Or you need anyone?"

"You, I need you, I promise," the blonde panted, pulling at his chains.

"Liar," Sasuke smiled bitterly, "lay back."

"Why?" Naruto, ever rebellious, asked.

"If you lay back, I'll touch you," he answered simply, exhilaration rushing through him at the way Naruto's breath hitched at the words. He obediently moved back to lean against the wall, letting his hands relax against the chains. Sasuke could see the angry red imprint of the metal on Naruto's skin—no doubt this hadn't been the first time he had fought against his restraints. He moved down to lean over the blonde, kneeling in between his spread legs. He wouldn't take Naruto unless he had to, and he didn't particularly want to bottom for someone's mind who had been lost to lust. It wasn't his first time—Sasuke had taken many consorts and lovers during his time in Sound, but all they had brought was images of blonde hair and whisker marks—but it was likely Naruto's, and he was exactly the kind of idiot to be sentimental over this sort of thing.

He leaned down and took Naruto into his mouth. The moan he got as a reward was enough to nearly make him cum then and there; Naruto's hips jumped up and Sasuke had to reposition himself to hold Naruto's hips firmly to the ground. His gag reflex wasn't that desensitized.

He leaned back down, relishing in the whines and groans coming from the blonde underneath him, memorizing the feel of his skin and the sounds he made. He indulged the blonde in going faster and teased him by letting go and licking at the sides of Naruto's cock; oh, how he wished he could take off the blindfold and see Naruto's full expression—see the look in his eyes as Sasuke went down on him, see the face he made as he—

"Ah—aaah—aaaah!" Naruto moaned as he came, just as loud as Sasuke had always dreamed he would be. He let go, breathing heavily, wishing he had requested some water in the basket—although the taste of Naruto in his mouth wasn't altogether unpleasant.

"Mm," said Naruto, and Sasuke smirked down at him. He expected the blonde to pass out sometime soon while the jutsu wore off—it's not like he needed to towel him off or anything. He could feel his cock aching, pulsing with need—but that's something he could take care of at home. He certainly had plenty of material for his fantasies now…

"Mm," Naruto said again, and he raised his legs up and wrapped them around Sasuke, pulling him close. Sasuke stared at him in shock.

"Fuck me," Naruto moaned, his erection back in full force. Sasuke nearly fainted. He didn't think he would ever get over hearing Naruto say that.

"W-what?" Sasuke said, attempting to pull himself up from where he was squashed against Naruto's chest. "You're still…"

Naruto tightened his legs and thrust his hips up, rubbing against Sasuke.

"Fuck me!" He thrust up again and this time Sasuke couldn't help but groan—it felt so damn good. And Naruto clearly wasn't cured yet, so…

He leaned in close to Naruto's ear. "I'm going to need to take off my clothes if you want me to fuck you, idiot."

Naruto's responded by desperately fighting against the chains—Sasuke liked to think it was to rip his clothes off—but eventually gave up and loosened his legs instead.

Sasuke took the opportunity to slip away and dig through the basket, finding—among other things—several different kinds of lube and condoms. Sasuke didn't bother fishing through them to find what would work the best—he just grabbed whatever looked good enough to use. He toyed with the idea of not using a condom, but if, like he hoped, Naruto had no memory of any of this, and he had any sort of leakage after the jutsu wore off…the risk wasn't worth it.

Ignoring Naruto's moans and pleas, he took the time to put the condom on and make sure there wasn't anything else he needed—he didn't think Naruto would let him go away again.

Wearing a condom, holding lube, and totally naked, Sasuke took a deep breath to calm the nerves that he didn't totally understand. He looked towards Naruto, who was kneeling and pulling at his chains again. A selfish part of himself didn't want this to work—wanted Naruto to be like this forever…be his forever…

"What's my name?" He forced himself to ask.

The question seemed to surprise Naruto.

"I don't care," he answered honestly, and went right back to coercing Sasuke to come closer.

Sasuke closed his eyes for a moment and let the pang in his chest settle.

"Of course you don't," he muttered.

Well. At least his identity was safe.

He crossed the room.

In spite of Naruto's begging for "more, more, please, more!", Sasuke took his time to prepare the blonde. He liked to think he was saving Naruto some pain, although he wasn't entirely sure he could feel it at the moment. He let a second finger slide into Naruto, smiling at the blonde's loud, drawn out shout of "yes!"

But he was getting impatient, and soon after he had stretched Naruto with a third finger, he readied himself to enter him. Naruto must have noticed him shifting, because he became much more aggressive in pulling at his chains and lifted his legs up in preparation.

Sasuke let one arm slide under and around one of Naruto's legs, which came to rest on his shoulder, and lifted his hips up, basking in the feel of his warm skin. He positioned himself, already lubed up, at Naruto's entrance.

"Ready?" He asked, as if the blonde would say anything but yes.

"Damn it, fuck me!"

Sasuke didn't need to be told twice.

Being inside Naruto was—it was heaven. Sasuke didn't know how else he could describe it. He was so overwhelmed with pleasure that he could barely even think. All he could feel was Naruto—every one of his senses was filled—overwhelmed—with Naruto, Naruto, Na—ah…

And Naruto certainly seemed to be enjoying himself, from the way his begging and pleading had changed into calls of "yes—yea—oh god, oh f-fuck yes!"

Still, even as he was inside him, Sasuke wasn't as close to Naruto as he wanted to be. He pulled out, ignoring the protests and told Naruto, "let me get behind you."

Naruto was surprisingly cooperative, letting Sasuke slide behind him and pull him onto his lap. Naruto leaned back, arching against Sasuke's chest as the Uchiha entered him again. Sasuke wrapped his arms around Naruto and pulled him close, pressing their skin together as he continued thrusting into Naruto. He couldn't help the sounds coming out of his mouth; he didn't think he could stop them if he tried. No other experience had been like this—no one else had been Naruto.

He heard Naruto's moans getting higher and louder, their pace became faster and harder, Sasuke thought he called Naruto's name, he couldn't be sure and—

"Aaah!" Naruto came first, destroying any will Sasuke had to make this last longer as he pressed Sasuke as deep as he could go. Sasuke felt a rush, unlike he had ever felt—

"—Naru—I lo—I love—aah!"

He screamed as he came inside Naruto, his back arching with such intensity that his head slammed against the wall behind him—but he barely felt it, instead collapsing into the bliss that pulsed through his body like lightening. He felt Naruto fall back onto him, and knew the blonde had immediately fallen unconscious. Thank goodness.

It was the last thing he wanted to do, but he forced himself to pull out of Naruto and set to cleaning them both up. He cleaned himself first; thankfully Tsunade had thought of this part, because Sasuke sure hadn't. He wiped Naruto down gently, but thoroughly: even the sweat on his brow. He assumed Tsunade would move him somewhere more comfortable after he used the scroll; he couldn't imagine Naruto reacting very well to waking up in a jail cell.

He finished cleaning, and stood straight. For a moment, he just watched Naruto—memorizing every inch of his body, taking in a sight that he would never see again…

He threw out everything he had used, ripped the scroll, and went home to reality.

A/N: I hope you all enjoyed! This is going to be a shorter one - only three chapters, plus a smutty little extra. I have a much longer one in the works, but that's shaping up to be very much a long term project.

Let me know what you thought! See you tomorrow :)

- Kinomi