Chapter Text
The train station was alive with the chaotic energy of rush hour. Yuuji stood at the edge of the platform, practically bouncing on his toes, his excitement shining through the crowded atmosphere.
“This is going to be awesome!” he said, grinning ear to ear.
Behind him, Megumi crossed his arms, his usual scowl firmly in place. “You’re way too hyped for a cosplay event.”
“Hey, it’s not just cosplay! There’s merch, performances—it’s the full experience,” Yuuji argued, puffing out his chest. “It’s like living inside an anime.”
Megumi gave him a skeptical glance.
“I bet you just want to see girls in mini skirts and sexy outfits.”
Before Yuuji could retort, a heavy, annoyed voice cut through the station’s din.
“Hey, brat. I’m finally here.”
Yuuji and Megumi turned in unison to see Sukuna approaching, his tall frame and unmistakable presence making heads turn. His eyes flicked over Megumi briefly—like one might glance at an inanimate object—before focusing entirely on Yuuji, as he usually does.
“Really? What are you doing here?” Megumi asked, his tone sharp with irritation.
It’s been a few weeks since he and Yuuji became friends. Yuuji was a ray of sunshine, really. But his brother was fucking pain in the ass. Sukuna nd Megumi did not get along at all. It was just annoying— the way Sukuna hovered over Yuuji like he was some helpless princess waiting for rescue all the time.
It intrigued Megumi as much as it pissed him off.
He was really quiet about it in the beginning, since Sukuna was probably three times his size, but now enough time has passed and Megumi still remembers the old times when he was just a little younger and used to beat the shit out of his bullies.
If it got physical, he was ready. Someday, it will probably happen.
Sukuna sneered, stepping closer until he loomed over them.
“Do you really think this brat can handle a crowd like this by himself?” He jerked a thumb at Yuuji, his expression dripping with condescension.
“Hey!” Yuuji protested, his cheeks already warming. Megumi only laughed in sarcasm, because in case Sukuna didn’t notice, Yuuji was not alone. Megumi was right there.
“The real question is why are you here, Fushiguro. Can’t you let go of my brother?”
Megumi’s brow twitched in irritation, but Yuuji quickly stepped between them before they start to argue, hands raised in exasperation. “Okay, okay, let’s not turn this into a thing! The train’s almost here, and we’re gonna be late and I really don’t want to miss it.”
Sukuna gave a derisive snort but didn’t argue. Instead, he stepped back, his sharp gaze flicking to the arriving train.
When the train screeched into the station, a rush of hot air and shuffling passengers followed. Yuuji, determined to avoid any more awkward exchanges, stepped into the train first, grabbing onto an overhead handle. The train was packed—shoulder to shoulder, every inch of space filled with bodies jostling for balance.
Megumi slipped in after him, managing to find a spot near the door. Sukuna, however, was last to board. The moment his large frame entered, people instinctively made room, though there wasn’t much to spare. Yuuji barely noticed. The train lurched forward suddenly, and he stumbled, his grip on the handle slipping.
Before he could regain his balance, Sukuna’s hand shot out, gripping Yuuji’s waist and pulling him back sharply. Yuuji’s back collided with Sukuna’s chest, and the sound of Sukuna’s low chuckle rumbled against him.
“Careful, brat,” Sukuna murmured, his hand still firmly on Yuuji’s waist.
Yuuji froze, his cheeks instantly flooding with heat. “I—mmmn!” he stammered, squirming slightly in Sukuna’s grip. “I was fine.”
“Sure.” Sukuna drawled, his tone amused. His fingers flexed slightly, the firm press of his hand against Yuuji’s narrow waist making it clear that he wasn’t letting go anytime soon.
“‘Kuna..” Yuuji almost purred, glancing around nervously. He could feel the heat irradiating from his brother’s body, the way his breath was tickling his sensitive neck, making Yuuji shiver. His voice couldn’t hide how nervous he was, even though his body was so used to the touch that he almost leaned against his brother’s chest. “People are looking.”
“So?” Sukuna leaned down, his breath brushing against Yuuji’s ear. The boy groaned, but stood in place. Sukuna’s voice dropped, low and teasing. “What’s wrong, brat? Feeling shy?”
Yuuji’s blush deepened, his heart pounding in his chest. “No! It’s just—it’s weird!”
“Weird, huh?” Sukuna’s smirk was audible in his voice. He adjusted his stance slightly, pressing closer until Yuuji could feel the firm lines of his chest against his back. Yuuji suddenly was too aware of the hand on his waist, the way Sukuna’s hip was too close to his, almost grinding him. If he moved his hips just a little bit more, he would feel Sukuna’s crotch, and maybe, just maybe, his cock. “Since when is being close to your big brother weird?”
Yuuji’s breath hitched, his fingers gripping the strap above him tighter. He couldn’t pull away—not with the crush of passengers around them and the iron weight of Sukuna’s arm anchoring him in place. He wasn’t even sure if he wanted to pull away, even when he knew it was the right thing to do.
“Are you okay, brat?” Sukuna asked, his voice laced with mock concern. “You’re kinda red.”
Yuuji nodded quickly, too flustered to form a coherent response.
“Good,” Sukuna murmured, his thumb brushing lightly over Yuuji’s waist in a gesture that felt far too deliberate. “Wouldn’t want you fainting on me.”
Yuuji clenched his teeth, his blush spreading to the tips of his ears. “I’m fine! Just stop being so—so close!”
Sukuna laughed softly, a deep, rumbling sound that made Yuuji’s stomach twist in a way he couldn’t name. “Relax. I’m just making sure you don’t get squished. These fuckers are completely uneducated.”
Megumi, standing a few feet away, had been watching them without a single blink of his eyes. The way Sukuna’s arm curled possessively around Yuuji, the way Yuuji’s face burned bright red, the way the touches between them felt so intimate. Did they realize they were in public? No—did they realize they were brothers? The train was full, and yet, the other passengers seemed oblivious, too busy with their own discomfort to notice the two brothers practically dry humping in public.
The train jolted again, and Sukuna’s hold on Yuuji tightened instinctively. Yuuji’s fingers brushed against Sukuna’s forearm as he tried to steady himself.
“Kuna,” Yuuji muttered under his breath, his voice barely audible over the hum of the train. “Let go already. I’m fine.”
Sukuna leaned down again, his voice a soft growl against Yuuji’s ear. “Are you sure about that? You look like you’re about to pass out.”
“I’m fine,” Yuuji repeated, though his voice wavered slightly.
A man standing nearby glanced at them briefly, his gaze lingering on Yuuji’s flushed face. Sukuna noticed immediately. His eyes sharpened, and his lips curled into a warning sneer. The man quickly looked away, pretending to adjust his bag. Sukuna grinned, as he was thinking yeah, keep walking, he is taken.
Megumi’s frown deepened. How could people not see this?
Sukuna’s arm shifted slightly, his thumb brushing against Yuuji’s side again as if to reaffirm his claim. “See that?” he murmured. “You don’t even notice when people are staring at you. That’s why you need me here.”
Yuuji’s blush deepened, and he twisted his neck to glare up at Sukuna. “Maybe people stare because you’re the one making it weird!”
The man smirked, his teeth flashing. “Nah, you’re just too pretty.”
Before Yuuji could blush and struggle with his words, the train began to slow as they approached their stop. Sukuna finally released him, though the phantom weight of his hand lingered on Yuuji’s waist.
As the doors opened, Sukuna placed a firm hand on Yuuji’s neck, steering him off the train with casual authority. Megumi followed silently, his stomach twisting with unease.
Was he really being a third wheel?
For brothers?
Yuuji groaned, pulling away from Sukuna’s grip as they stepped onto the platform. “You’re impossible,” he muttered, his face still burning.
“And you’re dumb,” Sukuna replied smoothly, his smirk never fading. “You need me.”
Megumi watched them walk ahead, his eyes lingering on Sukuna’s hand as it briefly brushed against Yuuji’s back.
Whatever that was, it was not right.
The cosplay event was winding down, but the vibrant energy still lingered in the air. Neon lights flickered softly against the encroaching darkness, and the last remnants of the crowd drifted lazily between the remaining booths. Yuuji moved ahead with his usual enthusiasm, holding up his bag of purchases like a trophy.
“This is the best day ever!” Yuuji exclaimed, stopping to admire a booth selling intricately designed props. He turned to Megumi with an eager grin. “Don’t you think this is awesome?”
Megumi barely glanced at the display, his arms crossed. “It’s fine. You’re way too excited about foam swords, though.”
“They’re not just foam! Look at the detail!” Yuuji protested, pouting.
Behind them, Sukuna’s imposing frame loomed like a shadow. His eyes followed Yuuji, sharp and calculating. He remained silent, his presence alone enough to make people part around them.
Like a bodyguard.
Yuuji wandered toward a nearby booth showcasing enamel pins, and his gaze immediately landed on a glittering bat-shaped pin. He gasped, holding it up reverently. “Whoa, look at this!”
“You’re not buying that, are you?” Megumi asked, raising a skeptical eyebrow.
Yuuji checked the price tag and sighed. “God, I’m so broke. There’s no way I could afford it.”
Before he could put it back, Sukuna stepped forward. His hand slid into his pocket, pulling out his sleek wallet. “How much?”
The vendor flinched slightly, startled by Sukuna’s sudden approach. “Ten dollars, sir.”
Sukuna handed over the bill without hesitation and picked up the pin, holding it out to Yuuji.
Yuuji blinked up at him in surprise. “Wait, really? Sukuna, you didn’t have to—”
“Take it,” Sukuna interrupted, his tone impatient. His eyes locked onto Yuuji, but unlike his urgent voice, his eyes were soft, caring, “Before I regret it.”
He knew he would do anything to make Yuuji happy. An overpriced pin was the very minimal he would do for him, anyways.
For a moment, Yuuji hesitated, then broke into a wide grin.
“Thanks, ‘Kuna!” He didn’t even think, just stepped forward and threw his arms around Sukuna in a quick, impulsive hug.
Sukuna smiled, amused. He felt Yuuji’s warmth pressed against him, his smaller frame fitting perfectly against his chest. Yuuji was a strong guy, but next to him, he was nothing but a small little boy. The faint scent of his shampoo mixed with the subtle heat of his skin, rising to meet Sukuna’s heightened senses. His hands hovered briefly before settling on Yuuji’s waist, his grip firm, caring, possessive. He couldn’t help but glance at Megumi with a satisfied expression, as he was saying: see? I win. I always win.
Yuuji pulled back slightly, tilting his face up to smile at Sukuna. His bright smile making his brother’s chest feel warm, almost leaning over him, almost staring too much at his mouth. They were so close Sukuna felt his body shiver with an unknown expectation.
“You’re the best, aniki!”
The word hit Sukuna like a lightning strike. His eyes darkened and his grip tightened on Yuuji’s waist. A low, almost threatening growl rumbled in his chest as he shook his head in something that could look like disapproval, but Yuuji wasn’t sure.
“Don’t call me that,” Sukuna said, his voice low and restrained, almost a whisper.
Yuuji blinked, startled. “Huh? But—”
“Drop it, Yuuji.” His voice was sharp, almost venomous, and his fingers slowly moved away from Yuuji’s waist, making his skin feel cold immediately. Their eyes were still locked, and Sukuna saw Yuuji’s brows furrowed in confusion, his lips parting as if to add something else, maybe insist a little more.
But the intensity in Sukuna’s eyes stopped him. He swallowed nervously, stepping back, trying to break the sudden tension between them.
“Geez, okay,” Yuuji muttered, adjusting his bag awkwardly. He looked around, a little embarrassed. “Sorry.”
Megumi’s sharp voice cut through the moment, breaking what was left of the tension. “Are you two done? People are starting to stare. We need to go home.”
Sukuna shot him a glare, but Megumi didn’t back down, his arms crossed as he looked pointedly between the two. “Let’s just go. The performances are over anyway.”
The train ride home was unusually quiet. Yuuji sat by the window, his head resting comfortably against Sukuna’s shoulder. His fingers played idly with the glittering pin Sukuna had bought him, turning it over and over in his hand. The warm hum of the train and the fading excitement of the day left Yuuji visibly tired, his eyelids drooping.
Behind them, Megumi sat stiffly, his sharp eyes darting between Sukuna and Yuuji. His frown deepened the longer he watched them. Yuuji leaned into Sukuna as though it were the most natural thing in the world, while Sukuna’s unreadable expression and steady gaze on his younger brother left a pit in Megumi’s stomach.
The train screeched to a halt, announcing the next stop. Megumi stood, slinging his bag over his shoulder. “This is where I get off,” he said flatly, his tone curt.
Yuuji straightened slightly, his face lighting up. “Thanks for coming, Megumi! I know this wasn’t really your thing.”
“Yeah,” Megumi said, glancing briefly at Yuuji before his gaze flicked to Sukuna. His eyes lingered, his frown deepening. “Bye, Yuuji.
Sukuna smirked, tilting his head mockingly. “Yeah, act like only Yuuji is here.”
Megumi didn’t bother replying, his sharp gaze cutting to Sukuna one last time before stepping off the train.
Yuuji sighed, leaning back against Sukuna’s shoulder. “He’s so grumpy sometimes,” he mumbled, his voice thick with sleep.
“Grumpy doesn’t even begin to cover it,” Sukuna muttered, though his smirk softened as he glanced down at Yuuji’s half-asleep face.
Yuuji shifted slightly, rubbing his cheek against Sukuna’s shoulder. “Its almost our stop and I’m so sleepy.. You should carry me home, Kuna,” he said teasingly, his words slurring as exhaustion pulled at him. He looked at his brother, smiling, his puppy eyes making sukuna’s heart melt.
Sukuna’s smirk widened, his eyes narrowing. “You think I won’t?”
Before Yuuji could respond, Sukuna stood and scooped him up effortlessly, cradling him in a full fiancé-style hold.
“Sukuna!” Yuuji yelped, his hands flying up to grip Sukuna’s shirt. “People are staring!”
“And?” Sukuna’s smirk turned devious as he walked off the train, completely unfazed by the curious glances they received. “Maybe they’re jealous.”
Yuuji groaned, burying his face in Sukuna’s chest. “You’re so embarrassing,” he muttered, though there was no real heat in his words. He felt comfortable, cozy. Sukuna felt like home.
“Nah, you asked for it, brat,” Sukuna replied, his tone light but firm as he carried Yuuji through the quiet streets toward their apartment.
The apartment was dark and silent when they arrived, the lack of their parents’ car in the driveway confirming what they already knew—they were alone.
Sukuna stepped inside, closing the door behind him and locking it with a quiet click. He finally set Yuuji down, his movements steady and careful.
Yuuji stretched his arms above his head, yawning. “You didn’t have to actually carry me, you know.”
“You’re the one who said it,” Sukuna shot back, leaning casually against the door. His smirk returned as he added, “Why do you care so much about what people think, anyway? You didn’t even want to sit on my lap earlier.”
Yuuji’s cheeks turned red. “Because that would’ve been weird! Even for us!”
Sukuna frowned, not quite happy about the “even for us” implication. His sharp gaze locked onto Yuuji. “It’s not weird. It’s who we are.”
Yuuji hesitated, looking away.
“People don’t always see it that way,” he said softly.
Sukuna pushed off the doorframe, stepping closer. “Who cares what people think?”
“It’s not just people,” Yuuji insisted a little more, his voice uncertain. He didn’t want to make his brother upset, yet, he wanted to make a point. “Mom and Dad don’t think it’s right either. That’s why they made us go to different schools and we got separate rooms.”
Sukuna’s jaw tightened, the weight of those words sinking in. He remembered the passive-aggressive comments, the subtle but deliberate moves their parents made to separate them since Yuuji was really young. The seven-year age gap between them had always been an excuse, but Sukuna knew the truth. They wanted to separate them. Even when they themselves weren’t present most of the time.
“They were trying to push me out,” Sukuna said in a explanation voice. “Which is really unfair, since they don’t understand our bond.”
“But you didn’t,” Yuuji said, his voice laced with quiet gratitude.
“Of course not,” Sukuna snapped, his crimson eyes blazing. “And I never will. Forget about Mom and Dad. They don’t know anything. Don’t be stupid about it.”
Yuuji frowned, his hands balling into fists. “Don’t call me stupid! You know I hate that! I’m just trying to talk to you and show my point but you never listen to me.”
“Shut up, you’re so fucking annoying.” Sukuna’s eyes flashed dangerously. “I swear, sometimes I just want to hit you.”
“Then hit me!” Yuuji shot back, his voice rising in defiance.
The air seemed to shift.
Sukuna took one deliberate step forward, because he never backed out from a challenge. He got closer, his imposing frame towering over Yuuji. The younger boy’s back hit the wall, his eyes widening as Sukuna loomed over him.
He looked up to find his brother’s eyes locked in his, dark, obscure, malicious, even.
“Do you have any idea what you do to me,” Sukuna growled, his voice low and dangerous, “when you look at me with those stupid puppy eyes?”
Yuuji blinked, startled. “What puppy eyes?” he asked, his voice soft and confused.
Sukuna shivered, holding back a groan. Yuuji tried to look angry, but he was too cute for that. The older man braced his hands on the wall, trapping Yuuji between his arms. Sukuna was so close now, his face inches away, his sharp gaze boring into Yuuji’s.
Sukuna’s mind raced, the weight of years of restraint pressing down on him. He’d spent so long keeping himself in check, pretending the closeness was purely familial, he couldn’t slip now. Even when Yuuji was staring at him like he was asking to be kissed, to be taken.
“Be careful, brat,” Sukuna murmured, his voice rough and tinged with warning. “I only have so much self-control.”
“I have no idea what you’re talking about,” Yuuji replied, his voice soft but steady.
Sukuna growled low in his throat, his gaze flicking to Yuuji’s lips. He was too oblivious and naive for his own good. For a moment, he leaned in, the tension between them thick enough to choke. But instead of closing the distance, he pressed his forehead against Yuuji’s, taking a shuddering breath.
“Go to your room,” Sukuna said, his voice tight with barely restrained anger.
Yuuji blinked, startled by the sudden shift. “I thought you were going to hit me?”
“Go to your fucking room,” Sukuna snarled, his tone harsh enough to make Yuuji flinch. “Before I make you.”
Yuuji swallowed hard, pushing past Sukuna without another word. The silence in the apartment was deafening as his footsteps retreated down the hallway.
Sukuna stood frozen for a moment before letting out a low, frustrated growl. He collapsed onto the couch, his head falling back against the cushions.
“I need a fucking beer,” he muttered, closing his eyes as the weight of his own restraint pressed down on him like a vice.