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Shouto was used to his older brother's door being closed. Touya never really had been the most social with their family—not that anyone could really blame him for that, given how intense their father got with him. So when he would come home from his college courses and shut himself off in his room, it didn't really matter if he was grumpy, going online to game with his friends, doing homework, or taking a nap; Shouto knew not to bother him most of the time.
He did wonder sometimes, though, about the little ribbons that he decorated his doorknob with. Natsuo showed them to him when he was younger, testing his knowledge about the colors—red, yellow, and green, Shouto knew, but he wasn't sure what exactly they meant. His big brother informed him that they were just signs showing Touya's mood, but that the green didn't necessarily mean he wanted company, nor did the red mean he didn't want anybody around—but still, those nights when Shouto heard tiptoeing in the hallway and snuck to his door to see who was up, he would see Natsuo creep into the room and close the door behind him gently reinforced the idea that Natsuo was one of the few people who Touya would allow in on nights the red ribbon was outside.
After their father left, Shouto still dealt with nightmares, and he wished so intensely that Natsuo would tiptoe to his door on those nights and hold him tight, whispering that he was okay and petting his hair until he fell asleep again. He wondered if that's what he was doing for Touya when the door was marked with a red ribbon. Even if Natsuo was younger than Touya, his presence was calming, and he didn't have the same mood swings that Touya seemed to experience, so it made sense that he'd be welcome if Touya wasn't feeling well.
But Shouto didn't try to bend the rules for himself. Sure, sometimes Touya would let him into the room while he was gaming, and Shouto would sit on the floor with Touya on the bed, the controller clicking wildly while he mowed down zombies or dark wizards or whatever his craving was on that day. But Touya would still usher him out of the room when it was getting close to bedtime, giving Shouto a long hug and thanking him for hanging out. That felt nice; to be held and told he was a good kid, or just plain good company.
He did ask Natsuo one night, when he caught him sneaking back to his own bed on a night Touya's door was adorned with a green ribbon. He cracked his door and stood there, waiting. Natsuo caught him peering through the crack and paused, looking down the hallway before stepping into Shouto's room. He sat down on the bed with him, and Shouto laid his head in Natsuo's lap. "What did Touya need?" he'd asked.
"I'll tell you about it later," he said quietly. "You doing okay?"
Shouto had shuffled uncomfortably. "Had another bad dream."
"Awh, poor baby," Natsu said, and held his arms forward. "C'mere."
Shouto was eleven by that point, but the invitation to sit in Natsuo's lap was a welcome one, so he clambered up onto the bed and situated himself with his legs over his older brother's thigh so he could lean his head against his chest. "Thanks. Sorry."
"It's okay," Natsuo said, running his hand along the back of Shouto's thin tee-shirt (one of his own hand-me-downs, actually). "Wanna talk about it?"
Shouto had shaken his head, his hair rubbing against Natsuo's bare chest, and Natsuo responded with silence, only continuing to hold him. Eventually they shifted positions so Shouto could lie back down, and Natsu laid next to him with a hand on his chest, rubbing circles across the tee shirt while Shouto drifted off.
He had woken up to find his bed empty, but remembered that night fondly.
It happened every so often after that, with Shouto catching Natsuo creeping in his boxers down the hallway, and Natsuo stepping into the room to calm him down.
He tried asking again about Touya when he was thirteen, but Natsuo had shut him down quickly. "I'll tell you when you're older," he'd said, and tried to change the subject.
"Is it an adult thing?" Shouto had asked stubbornly. "I'm already thirteen. I know about some of that stuff."
Natsuo had frozen up a little bit, but shook his head and said, "Well, I should have known. You're growing up." He paused, then breathed out. His warm breath ruffled Shouto's hair. "Don't worry about it, 'kay? He just... Needs attention sometimes. He gets lonely."
"Can I help him?" Shouto asked, and again, Natsuo had stiffened, then shifted Shouto in his lap and declined to answer.
He gave up after that, for a while.
He found out a few months later, when instead of catching Natsuo on his way back, he woke up to see him sneaking down to hallway toward Touya's room. He'd remained quiet, then snuck to follow once Natsuo had shut the door behind him, and listened at the door.
Natsuo's words were muffled, but he recognized the tone, and something about how he was "here to give him what he needed." Shouto remained as still as he could with his ear pressed against the wood grain, and caught some grunts and moans and the sound of Touya's mattress creaking. With that, he felt understood at least part of it. They were doing adult things, the kind that his friend Sero had shown him in naughty videos and pictures during lunch break. He felt himself getting hard in his briefs as he realized what was happening, and couldn't help but palm himself through the slightly dampening fabric.
Then, with a hearty moan, the creaking stopped, and Shouto panicked, running back down the hall and into his room, closing his door a bit more loudly than intended. He crawled under the covers, breathless, nervous, and still—confusingly—incredibly hard.
A couple minutes later, he heard a gentle tap at his door.
"Shouto?" Came Natsuo's voice. "Are you awake?"
He pretending whether to be asleep for a moment, but when Natsuo pushed his door open and asked again, he pulled the covers down under his chin and looked sheepishly up at his older brother. "I'm sorry," he said, feeling tears start to well up.
Natsuo's face instantly softened, and he quickly stepped to Shouto's bed and slipped in alongside him. "You were listening at the door, weren't you?"
Again, Shouto had considered lying, but the way Natsuo looked at him softly, a gentle thumb on his cheek, made him reconsider. He nodded.
Natsuo sighed. "Do you understand what was happening?"
Shouto shook his head, letting out a "nuh". He looked down to Natsuo's flushed chest, still glistening with a light sheen of sweat, and said, "You were doing adult things with him."
"Yeah," Natsuo said, and exhaled heavily. "Yeah. I was..."
Shouto looked back up to his brother's face. "Why?"
Natsuo flinched. "It's... Hard to explain." He chewed at his lip. "Well, no, it's not. It's just weird to explain to you." He laughed a little bit, a quiet chuckle in his throat. "Do you remember how Touya and Dad used to spend a lot of time together when he was younger?"
Shouto nodded.
"He remembers that stuff. And... He didn't like it, with dad. But he and I tried it one night. We were just talking after one of his bad dreams, and he kissed me... And we messed around. It felt good, so... Now we do this."
Shouto balled up his hands and rested his fists against Natsuo's chest. "Dad... Did adult stuff with Touya?"
Natsuo nodded. "Mm-hmm. And Touya is getting over it, so we used to just talk and spend time together, but now but he asked me to help."
"Oh." Shouto felt his little dick get harder at that thought, at the idea of his seventeen year old brother with Touya, doing all the things from Sero's videos... "What about me?"
"Hmm?" Natsuo looked surprised. "What do you mean?"
"Does he get nightmares like me?" He unclenched his fists and traced his fingers across Natsuo's broad chest. "Would it help me, too?"
"I dunno, Shouto," he said, looking a little nervous. "It's what he wants, so it's what we do, but for you, you've always been okay just cuddling—"
"Then can I help?"
That had stopped Natsuo immediately. His mouth hung open, lips apart, and he swallowed. Shouto watched his tongue dart out, wetting his lower lip, and he closed his eyes for a moment before pressing his lips to Shouto's head. "I'll ask, okay?"
Satisfied with that, Shouto nuzzled his face against Natsu's chest, an implicit request for him to stay, and always the kind older brother, Natsuo did.
Green meant yes, please. Yellow meant yes, but with some limits. Red meant not tonight, or I just want to talk and cuddle, whether that was because he was in a bad mood for some other reason.
Natsuo walked him through those rules once he'd spoken with Touya and had, apparently, gotten their eldest brother's approval. Shouto never heard anything from Touya about it, but he trusted Natsuo wasn't making things up.
"Next time it's green, I'll come and get you, okay?" Natsuo told him quietly, while Shouto was sitting nestled up against him listening carefully to his explanation. Shouto nodded along attentively. Touya had come home that day and gotten a snack before retiring to his room, apparently exhausted and not willing to socialize. Shouto hadn't expected much, if he was being honest with himself.
Yet when he went to bed that evening, he glanced down the hall and saw it: a green ribbon tied around the doorknob.
Climbing into bed that evening, he ached with anticipation. Natsuo had been informative in a purely factual sense, but Shouto wasn't sure exactly what Touya was feeling.
But after all the lights had gone out, a couple hours later, Shouto heard a soft knock at his door and quickly scrambled over on bare feet. He greeted Natsuo, who stood in his boxers, with a slow blink and a tentative smile, and Natsuo extended his hand, his face morphing into something more serious. Shouto found himself led down the hall toward Touya's door, and Natsuo cracked it open, ushering him inside.
Touya was asleep, faceup on his bed, with the comforter pulled up just past his waist. His bare chest rose and fell with each breath.
Natsuo closed the door behind them and led Shouto to the bedside. "I'll show you what happens, okay?" He whispered, a hand still on Shouto's shoulder. "Just follow what I say. And try not to make too much noise."
Shouto nodded, and Natsuo gently lifted the cover from Touya's body, exposing his naked lower half. He was skinnier than Natsuo; less muscular, more along the lines of Shouto if Shouto was a bit older. A couple round scars on his bare thighs attracted Shouto's attention, but he followed Natsuo's direction and remained silent.
Natsuo reached over to Touya's bedside table and grabbed a plastic bottle, then set it on the bed. After a deep breath, he grabbed the front of his boxers and tugged them down.
Seeing his brother's cock was surprising. It was at least twice the size of Shouto's, and as Natsuo stroked himself with a hand coated in liquid from the bottle, Shouto's eyes grew wider when he realized it was getting even bigger. He seemed satisfied after a minute of touching himself, and poured more of the clear liquid onto his fingertips, spreading Touya's legs and baring his ass to them. Shouto watched in fascination while his older brother slipped a slick finger into his oldest brother's butthole, prodding gently. Touya seemed to only respond by breathing a bit faster, so Natsuo continued, changing his angle slightly before pulling out and adding another finger. "Must've prepped himself a bit tonight," he muttered quietly, adoringly, his free hand holding up one of Touya's thighs to grant him easier access.
Shouto kept his eyes on the pair of them, and without much thought, stuffed his hand down the front of his own underwear, which earned him a smile from Natsuo. He imitated his brother's actions, pulling them down and off to free his hard cock, and slid his hand up and down his meagre length while he watched Natsuo finger Touya open. Natsuo's cock twitched when he looked up at Shouto, and he beckoned him closer.
"Touch him," Natsuo said, pointing down at Touya's penis. "He wants to be hard when I push in."
Shouto wasn't sure how Touya would know the difference—his oldest brother seemed to be out cold, his mouth open in a perpetual almost snore, eyes moving gently behind his eyelids, but he followed the directions he was given and placed his hand on Touya's chest before sliding it down his slim, muscled torso to his soft cock. At first, he just played with it gently, squishing it between his fingers and his palm, but a stifled laugh from Natsuo caught him off guard.
"Here, try this instead." He placed the had that hand been on Touya's thighs on the back of Shouto's head. "Don't worry. It doesn't taste bad."
Shouto let himself be guided down until he could smell Touya's cock, and at Natsuo's urging, he licked at it. Touya let out a quiet breath, and Shouto looked up at Natsuo for approval.
"It feels good for him when you put it in your mouth," he suggested.
Again, Shouto complied, grabbing the base of his brother's soft cock and guiding it into his mouth. His tongue slipped across the bottom of the head, and he remained still, eliciting another quiet laugh from Natsuo. The sound startled him, and his mouth shut slightly making Touya twitch a bit under him.
"Oh—careful," Natsuo warned, and Shouto pulled off. "No teeth."
Shouto leaned down to try again, but Natsuo shifted next to him so he was half-reclining in the bed under Touya's raised leg. His cock stood straight out from his body, hard and shining from the lubricant, and he slipped his fingers from Touya's butt and grabbed at the base. "You can practice on me first."
Shouto crawled toward him, and replaced Natsuo's hand with his, looking up for approval. Natsuo nodded encouragingly, wriggling his hips closer until he was reclining fully. Shouto used his fist to angle his brother's erection toward his mouth and licked at a clear droplet on the tip. It was slightly sweet, so he felt encouraged to go for more, and wrapped his lips around the head.
Natsuo sighed in pleasure at that. "Bob your head a bit." When Shouto did, letting more of the thick cock slide into his mouth, he glanced up to see Natsuo's head tilt back, his eyelids fluttering closed. "Yeah. Like that."
Recalling the guideline to not use teeth, Shouto grew a bit bolder, bobbing his head further to try to take more of Natsuo in. Natsuo hummed appreciatively, and his guidance seemed to cut off, which Shouto took as a good sign, and so continued. It tasted mostly of skin and something vaguely chemical—probably, he assumed, judging by the label on the bottle laying near Natsuo's hip, the lubricant—but every so often, another burst of that sweet fluid that leaked from the tip graced his tongue. Shouto definitely liked that part, he decided.
After a couple minutes of sucking on Natsuo's cock, Shouto looked up to see if he had any more advice, but instead saw Natsuo's face buried in Touya's butt, his tongue having taken over what his fingers had been doing earlier. With the tip of Natsuo's cock still in his mouth he watched interestedly while Natsuo pushed inside, then pulled out, licking around the darker skin before pushing in again. Touya continued to rest peacefully above them, letting out occasional whimpers, but remaining fast asleep.
Natsuo eventually pulled back, and after staring at the hole in front of him that remained just slightly open, he looked down at Shouto. "Gonna steal this from you," he said, grabbing the base of his cock. Shouto gave it a couple more licks, lapping at the pink head and hoping for just a bit more of the sweetness, but disappointedly allowed Natsuo to slide backwards and angle himself up onto his knees.
"Touya," Natsuo breathed, and leaned forward, pressing a kiss against their brother's lower lip. "I'm here. I'll take care of you." He then leaned back up and adjusted Touya's hips so they rested on his bunched up blanket, raised slightly. Shouto observed the wet head of Natsuo's erection glisten under the light coming through Touya's window as he re-applied the lubricant, then swiped the head across Touya's hole before pushing in, slowly, letting out a little grunt when his hips met Touya's.
Bringing his hand back to his own erection, Shouto stroked himself while he watched Natsuo rock his hips back, then forward, his girth stretching Touya, his full length disappearing inside of him with each thrust.
"You can—hngh—try again now, Shouto," he said, releasing one of Touya's legs. Their eldest brother was sprawled in what looked like an uncomfortable position, his head cocked to one side on his pillow, but he continued to breathe steadily, seemingly undisturbed.
Shouto leaned in again and licked at Touya's cock. It was a bit firmer than before—not nearly as hard as Natsuo's, though—and using his newly practiced skill, held it gently by the base and slid his tongue around the head, then took more of him inside. As he continued to suck, he felt Touya grow harder, which only encouraged him that he was doing well. Eventually, Touya's cock stopped growing, and while it wasn't as thick as Natsuo's had been, Shouto found that he couldn't quite take it into his mouth fully without choking.
"Good boy," Natsuo said, and Shouto felt a twinge of satisfaction at that, increasing the pace of his motions. Touya's cock began to leak similarly to Natsuo's, though his taste was slightly different, but paired with the more frequent sounds of pleasure coming from his sleeping brother's mouth, Shouto knew he was doing well. The frequency of that sweetness only increased as Natsuo pushed into Touya more roughly.
This continued for several more minutes, with Shouto growing more bold each passing moment and attempting to take more of Touya inside. He found that if he kept his head still, Natsuo's thrusts pushed Touya's hips forward and pushed his cock into his mouth, so he found a comfortable position and allowed that motion to push Touya deeper. Swallowing down the sweet droplets that leaked onto his tongue seemed to make it easier to take him, he realized, and eventually his lips met with the base of Touya's shaved crotch more frequently.
Natsuo panted above him, and Shouto felt his brother's hand cradling the back of his head, carding through his hair lovingly, then clutching more tightly, until Natsuo's rocking suddenly slowed. To make up for the lack of motion, Shouto started bobbing more intensely, and soon enough heard a higher pitched whimper from Touya, followed moments later by a gush of liquid onto the back of his tongue.
"You made him cum," Natsuo whispered, when Shouto pulled off, the liquid dribbling down his tongue and across his lips. He pulled Shouto upright and slid a hand across his lower back, pulling him closer. "You did such a good job."
Under them, Touya was still dozing, a smear of white from the semen that escaped Shouto's mouth pooling under the tip of his rapidly softening cock.
"Look how peaceful he is," Natsuo whispered into Shouto's ear, turning him to face Touya.
He really did look at peace, if slightly akimbo and flushed. But seeing him bared like this, in the aftermath of both of his brothers' orgasms, Shouto's own cock stood out in front of him, unattended to.
"Do you want to come too?" His brother whispered, tilting his head back. Shouto nodded and Natsuo guided him so he was kneeling over Touya. He kissed Shouto's shoulder, and Shouto felt his brother's still-hard cock slip between his thighs. A hand snaked around to his belly, lifting his shirt up to his chest and then over his head, then once he was fully naked, his other hand slid down to his three-and-a-half inch cock, where he wrapped his fingers around him and started stroking him. Under a practiced hand, the sensations were tenfold, and Shouto's hips jerked involuntarily backwards, his thighs tightening around Natsu's cock, and through the fuzzy feeling of pleasure he was feeling in his small body, he marveled at how Natsuo's cock pushed up between his legs, his balls resting against the tip. He didn't have long to appreciate the sight, though, as Natsuo started grinding against him, wet cock sliding between the cheeks of his ass, hand flying quickly and making Shouto arch his back with his mouth hanging open, panting heavily.
"Shh, I know it feels good, but we don't want to wake him up," Natsuo said, sliding his hand over Shouto's mouth, arching one finger inwards to give him something to suck on. Between all of the touches across his body, and the view in front of him, Shouto came undone, the fuzzy feeling turning into a blissful haze as he shot out a load of watery come across Touya's abdomen, dripping into Natsuo's fingers as well, all while Natsuo cooed into his ear and kissed at his neck and shoulders.
His big brother's hand slowed until Shouto finally felt himself coming down, and Natsuo caught him before he fell, holding him against his chest and kissing the top of his head gently and repeatedly.
Gaining a bit of strength back in his thighs, Shouto made to stand back up, but Natsuo was faster. Swiftly, he swung his arm under Shouto's legs and caught him, carrying him in both arms out of the room and back toward his own. He gently set him on his bed.
Still out of breath, Shouto looked up at Natsuo, who returned his hand to Shouto's cheek, his eyes searching Shouto's face. His own cock had softened, and Shouto took in the sight of his body, amazed and excited by it.
"You did great, buddy," Natsuo finally said, and leaned down to kiss Shouto's forehead. "Do you still want to cuddle, or—"
"Yes," Shouto said firmly.
Natsuo chuckled at that, and still nude, swung his leg up over Shouto, straddling him and kissing down his chest and tickling him before rolling down to lay next to him. "Did you like that?" He asked, once Shouto's giggles had calmed. "I mean, with Touya."
"Yeah," Shouto said. He rolled onto his side and pressed the full length of his body against Natsuo's, one arm over his chest and his face against the front of his armpit. "It was weird but I liked it."
"Good." Natsuo slid an arm under him and held him close, his hand returning to his hair. "It... Was nice to include you. You were pretty sexy."
Shouto giggled at that, feeling his cock harden a bit at both the compliment and the contact of their naked bodies. "It was weird to see Touya stay asleep like that."
"It was weird for me, too." Natsuo's gaze drifted to Shouto's ceiling. "At first. But now it feels normal. I mean, we do stuff when he's awake, too, but he likes it this way a lot." He blinked, then looked back at Shouto. "And now I guess you're part of the secret, too."
"Good." Shouto snuggled in even tighter. "I love you, Natsuo."
"Love you too, little bro." Natsuo kissed him again on the top of the head, then tilted his head up and kissed him gently on the mouth. This one was less rushed, more gentle, and Shouto melted into his touch, parting his lips when Natsuo's tongue swept across them. They remained connected until Shouto started absently humping at his hip, at which point Natsuo laughed into his mouth and pulled back. "Still horny, huh?"
Shouto squirmed. "Kinda."
"Well..." Natsuo smirked. "Wanna feel how what you did for us felt?"
Shouto nodded, and Natsuo flipped him onto his back. "Let big bro take care of you."
And take care of him, he did.
In the morning, Shouto woke up in time for breakfast with Fuyumi, and sat at the table with Natsuo, munching away at his bowl of cereal, swinging his legs gently. As he was finishing up, he heard a yawn, and turned to see Touya stretching at the entry to the kitchen.
"Morning, sleepyhead," Fuyumi teased. "Sleep well?"
"Yeah," Touya said. He glanced at Natsuo meaningfully. "Seems my sleeping meds do a pretty good job."
"Oh, good," Fuyumi replied, missing Natsuo's smirk.
"Plus, I had some really nice dreams about hanging out with this guy," he said, coming up alongside Shouto and ruffling his hair. Shouto blushed at that, wondering what exactly those dreams entailed, and how much of their activities had seeped into them. "Looking forward to trying again soon." Shouto caught his eye right as he winked, which made him all the redder.
That night, Shouto found a green shoelace in his room and tied it around his door, wondering if maybe—just maybe—he could have a turn, too.