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Tadashi was no stranger to engaging in less than strictly legal activities. Quite the opposite, really. He snapped out of it as he realized how much his baby brother idealized him, and he had to become a better influence. Not that he thought it was doing much good. But being a young genius is stressful no matter how you slice it. So he didn’t stop everything.
It started when he was sixteen. He was in all the advanced classes. He was in the robotics club. He was on the lacrosse team. He helped Aunt Cass at the cafe. He helped Hiro with his homework. Not that the boy really needed any help. But even back then they both insisted on shutting themselves in their room to get it done every night, and Cass couldn’t complain that her boys weren’t procrastinating. And they weren’t, but of course that wasn’t all they did. Things were so much newer between them all those years ago. Much more innocent, chaste even.
But it was still a lot for young Tadashi. He thought about how he could ease his anxiety levels with minimal adverse effects. Once he landed on something, he made sure he researched the safest ways to do it. And he was good enough with people, smart in so many ways, that he knew how to find the right connections.
So that was how Tadashi became a stoner.
It started small. He would sneak across the street once his brother and aunt were asleep to take a few puffs before bed. Then he started waking up before Hiro so he could blow the smoke out their bathroom window, hoping the shower steam would dilute the distinctive smell. When he started at SFIT he smoked on the walk to and from campus.
But then Hiro graduated and started walking to school with him. It became much harder for Tadashi to keep his secret around the boy. Nevermind the guilt accumulating in his gut throughout the years as their relationship evolved into something beyond just fraternal. He decided that since he was eighteen he would own up to it and tell Hiro. Just Hiro, though. He was good at keeping secrets, after all.
Immediately Hiro wanted in. Of course he did. He’s always wanted to do everything Tadashi did, wanted to be a part of as much of his life as possible. And he couldn’t be mad at his baby brother for it if he tried. They both knew how much of a soft spot he had for the boy. But this was the one area where Tadashi felt he couldn’t budge.
“I’m sorry, otouto. I just don’t feel good about it,” he said.
“This is really where you’re drawing the line?” Hiro asked, with a certain laziness to his voice that meant he thought he was winning this one.
“Yeah, actually. You’re too young -- I was too young!-- and we could both get in a lot of trouble if we’re caught.”
Hiro scoffed. “That hasn’t stopped us before.”
Tadashi couldn’t help but laugh. This kid was too good. “I still think you should listen to me on this. I promise you’ll be able to eventually, okay?”
Hiro couldn’t help himself from pouting the rest of the day but ultimately agreed. Especially after Tadashi pounded the attitude out of him.
Two-ish years later the decision to legalize marijuana showed up on the ballots. Tadashi told Hiro right away. San Fransokyo was pretty liberal, so they weren’t too worried. But it was still a huge relief when they saw the results. Tadashi had to wait til he was 21, but at least now his guy was bringing the green to him legally. The day his updated driver’s license comes in the mail he takes it to the nearest dispensary at Hiro’s urgent demand. And Tadashi doesn’t mind finally indulging the boy.
He and Hiro sit on the fire escape outside their bedroom. Cass is with her girlfriend for the weekend, so it’s the perfect opportunity. Tadashi made sure to bring cough drops and a big jug of water just in case. Hiro was practically vibrating with excitement.
“So I’ll do it first, try to copy how I do it,” he says, unlit joint in one hand and a red lighter in the other. He gives Hiro a sharp look. “Pay attention, okay?” When Hiro nods solemnly he gets started. The filtered tip of the joint slips between his lips and he brings the little fire to the other end. Hiro watches Tadashi's jaw and neck muscles work as he sucks the smoke into his lungs. When he pulls away he holds it for a bit, casually offering the joint to his brother with a little nod.
Hiro carefully grabs it between his thumb and index finger. As he brings it to his own lips Tadashi slowly breathes out, a white waterfall of smoke pouring out of his mouth and nostrils. He makes the action look so graceful and effortless. Hiro wants to look that good to his brother. Here goes nothing.
He pulls the smoke down his esophagus in what he assumes is the same way Tadashi did. He fills his lungs with the stuff, but when he stops it’s already too much, and there’s nowhere for any more air to go. He can barely hold it for a few seconds and starts coughing hard. Tadashi opens and holds out the water for the boy, takes the joint from him, and Hiro chugs a bunch once he’s finally able to breathe.
He wipes his mouth and opens his eyes and something like vertigo washes over him. He feels exhausted and keyed up at the same time. The burning in his throat is mostly forgotten. He blinks, looking over at his brother taking another drag.
“Dumbass,” Tadashi says with a little grin. “You’ll get the hang of it. You want any more?” He gives his brother time to think. He knows that’s a little difficult right now. That's the point, honestly. The way it turns your brain off. Finally Hiro nods. Tadashi almost misses it. He’s pretty far gone after just one hit. “Drink more water first,” he instructs, and Hiro does without any fuss. He almost always has something to say, but apparently weed shuts him up? It sparks something in Tadashi.
He holds the joint out for his little brother, close to his face. Hiro’s eyes flicker up to Tadashi, focusing and unfocusing as he tries to put the pieces together. Finally he leans forward and takes another more restrained drag. His lips press against Tadashi’s fingers. He still takes a little too much, coughs some more. Tadashi takes a few more hits and puts the joint away so he can focus on Hiro.
“Earth to Hiro,” Tadashi teases, trying to tickle the boy’s sides. Hiro responds, eventually, and tries to squirm away with so little fight in him. Tadashi wants to see what he can get away with. He has a feeling Hiro won’t mind. “Hey baby brother,” he says, sing-songy and slow and sweet. Hiro almost looks like he’s fighting off sleep, but he still responds immediately, turning his whole body to the older man. Tadashi slides a finger under Hiro’s chin, and he has all of his attention, looking up at him with doe eyes. A shameless mixture of devotion and desire. It burns in Tadashi’s belly.
Hiro hums. “Hey nii-san,” he sighs out. Such a relaxed sound, like all the tension has left his body. Tadashi notes how he's holding the kid's head up, how he's being leaned on, how he can almost see the gears struggling to turn in his empty little head.
"Whatcha thinkin' about, lil bro?" he coos. Hiro makes a face.
"Not so little anymore, ya know," he says after a little bit too long, so it’s not quite the witty retort he thinks it is. He's trying to be coy, trying to bait Tadashi. It's never very subtle, but right now he might as well be holding a bright neon OPEN sign. Tadashi had a feeling that weed would put Hiro in the mood. Well, what didn't at his age? And usually Hiro takes the reins when they're together; Tadashi was just happy to be there. But the years of weed-related experience he had over the teen felt… powerful, somehow? Hiro already usually hung on every word he said, but this was totally new. The temptation to exploit his sweet little bro for being young and naive was too strong, awoke the long dormant troublemaker within him.
He grins, shrugs nonchalantly. “Coulda fooled me,” he says, eyeing the boy as he lights back up. Hiro flusters, gets that look on his face. How dare you?! mixed with Challenge accepted .
But he doesn’t say anything, which Tadashi thinks is odd. He tilts his head, looking at Hiro in anticipation, pushing him. “Nothing to say?” He leans forward, preses the joint against the kid’s lips. As Hiro inhales he purrs out, “ Baby brother ?” It causes Hiro to sputter out what he managed to get into his lungs. Tadashi can’t help but relish the pulse of excitement he feels. It thrums to life in his groin, he leans into the feeling harder.
“Aw,” he says, “and you’d been doing so well that time, too.” He helps Hiro up so he can spit over the balcony. The boy is glaring at him, eyes red and glazed, still aware of the game. Tadashi decides Hiro isn’t nearly high enough yet.
“Here, let’s try this,” Tadashi says. He takes a long hit and gestures Hiro over. He puts his hand behind his neck and presses their lips together, exhaling the smoke into his mouth. It takes Hiro a second to register it, but he must have a few brain cells still left. Without breaking contact Tadashi puts the joint out and focuses on Hiro completely, pulling him into his body with his free hand.
Hiro is all but dead weight, letting his brother hold him tight against his chest. His arms are loosely hanging from Tadashi’s sleeves and he’s slow to react. But he’s kissing back. It’s messy and needy and he’s letting out these little moans already and Tadashi can only imagine what he’ll sound like when he’s--
Tadashi has to make the call, or he won’t be able to stop himself.
“Let’s go inside,” he says against Hiro’s mouth. The boy whines , high-pitched and fussy, and Tadashi almost caves. “Not out here, baby, c’mon.” He helps the wobbly boy up and through the window, but not before Tadashi gets a very good look at the tent in Hiro’s loose shorts as he stretches. Usually he would think that Hiro was doing it on purpose, but right now he’s not so sure. It puts a grin back on his face.
As soon as they’re inside Tadashi leads Hiro to the former’s side of the room, distracting him with lingering kisses the whole way. By the time they make it to the neatly made bed Hiro is tugging on Tadashi’s collar, already plenty worked up judging by the sounds he’s making. Tadashi doesn’t quite give in to him, enjoying Hiro’s desperation to a dizzying degree. He takes his time undressing the boy, kissing him deep and slow.
Hiro is bigger now. He’s almost a man. He still looks young for his age, but he’s filled out nicely in all the ways that matter. Namely, as Tadashi drags Hiro’s red shorts down his hairless legs, his cock. Sort of a miniature mirror image of his brother’s, it slaps against the teen’s flat tummy. Tadashi pulls Hiro into his body, the boy immediately bucking against his brother. He kisses his way down Hiro’s chest as slowly as his own desire can allow, enjoying every sound he hears. Once Hiro’s collar bones, nipples, and inner thighs are littered in teeth marks and bruises, he’s basically a puddle, and all Tadashi wants is to give him more. Give him everything .
“How ya feelin’?” he asks, squeezing Hiro’s plush thighs gently. The kid is so zoned out, but Tadashi needs an answer. “Color,” he says, and that does the trick.
“G-green,” Hiro chokes out instantly. Literally sobbing from pleasure. Tadashi regrets wearing jeans, but that’s all he needs.
“Good boy,” he says, with a kiss to Hiro’s inner thigh. He maneuvers them towards the edge of the bed, cushioning his knees and lifting Hiro’s angular hips with pillows. Tadashi almost wants to talk to him. He probably would at this point in their foreplay normally; it sets off Hiro’s bratty impatience every time and Tadashi lives for it. But he wants to tell him how hot he is like this, how they’re gonna be smoking a lot from here on out, how good he’s been for his big brother and his big brother only, how much he loves everything about him.
But he decides that Hiro’s been waiting long enough.
Tadashi guides Hiro’s legs to rest over his shoulders and leans forward, kissing low on the boy’s tummy. Hiro shudders in anticipation. Tadashi’s hands wrap around his boy’s perfect thighs to hold them still, and he wastes no more time. Hiro’s adorable, irresistible cocklet is begging to be swallowed whole, leaking and nearly purple, so that’s exactly what Tadashi does.
Hiro lets out a long, downright sinful sound, trying to thrust into his brother’s expert mouth. But Tadashi goes slowly, treating the boy like a popsicle after a hot day. He slurps his way up his shaft, licking around his foreskin before smoothly sliding down. It’s overwhelming but not enough to get off with, and they both know it. Not to mention that Tadashi isn’t letting Hiro move. He keeps it up, never letting up, never quite giving the boy what he craves. Once the tears are flowing freely and beautifully does Tadashi find mercy.
He removes his hands from Hiro’s body, trusting the boy to stay put as he grabs for their lube. The relentless pace on the boy’s cock doesn’t let up as Tadashi slicks up his fingers and gently rubs them around Hiro’s fluttering hole. His cock twitches in the other’s mouth in time with the surprised noise he lets out and Tadashi almost laughs. He grabs a handful of Hiro’s ass cheek to hold him open, and he pushes his first finger in. It’s still such a tight fit, but Hiro’s practically losing his mind already.
Tadashi rushes Hiro up to three fingers in under a minute, just how he knows his boy likes it, eventually matching the pace of his mouth on his dick. Hiro’s lifting himself off the bed, trying so hard to cum. The moment Tadashi finally strokes Hiro’s prostate, you’d think someone hooked up jumper cables to the teen. He starts fucking himself into Tadashi’s mouth and onto his fingers simultaneously, and Tadashi lets him. He’s earned it. It gets to the point where Tadashi can remain relatively stationary as the boy gets himself off. He’s vaguely thankful, once again, that they have the house to themselves tonight.
Hiro is practically screaming by the time Tadashi grabs one of his hands and squeezes, their nonverbal signal for permission. His hips shake as he cums down Tadashi’s throat. It feels like it lasts forever and it’s so intense that his brain feels scrambled, but his big brother milks him through it until he’s whimpering from the overstimulation. Tadashi rubs little circles into Hiro’s hips as he comes back into himself. As his breathing settles Tadashi cleans him up and helps him wiggle into his undies and a t-shirt.
“How are you, bro? Real talk,” Tadashi asks, once Hiro’s high mellowed out a little.
“Uh… good,” Hiro says eloquently. “I still don’t have the brain cell, but if you’re asking if I had fun?” He gives Tadashi two thumbs-up, grinning like a dork.
“And the pot?”
Hiro shrugs. “I dunno. I don’t really have a large data sample, ya know?” Tadashi rolls his eyes at his bro’s lame hinting, but nods and gestures for them to head back out onto the fire escape.
And that’s how Hiro becomes an even bigger stoner.