Chapter Text
The training grounds had finally gone quiet.
That silence didn’t come often at the Demon Slayer Corps, usually it was filled with the grunt of exertion, the rhythm of clashing wood, and the ragged breath of Hashira who pushed themselves past any reasonable limit. But tonight the sun had already dipped low, the sky was washed in that pale violet that lived between day and evening, and everyone else had drifted off toward food, reports, or their futon.
Everyone but two.
Sanemi Shinazugawa exhaled sharply as he dropped down onto the wooden engawa outside the training field. Sweat clung to his skin, along his jaw and the edges of the scars that webbed across him. His body felt wrung-out but in the way he liked it. It meant he had nothing left unspent.
He didn’t expect Obanai Iguro to follow him.
But he did.
Obanai peeled off his haori, and sat down beside him without a word. Kaburamaru, ever observant, curled loosely around Obanai’s shoulders, and flicked his tongue toward Sanemi in greeting.
Sanemi gave the snake a small nod. For some reason, Kaburamaru always seemed to sense his moods, and he wasn’t in a bad one tonight. Just tired.
"I thought you’d already be inside," Sanemi muttered, watching Obanai out of the corner of his eye. "You were pushing yourself harder than usual today."
Obanai crisscrossed his legs and leaned forward slightly. His mismatched eyes reflected the fading light. "You didn’t leave," he said quietly. "So I didn’t either."
Sanemi’s stomach tightened, and it wasn't painfully.
People said he and Obanai were alike: sharp edges, short tempers, distrust was worn like armor. But the truth was that Sanemi didn’t know many people who made him as aware of himself as Obanai did. Being near him forced Sanemi to stay awake, alert, and... soft in the places he usually kept locked down.
He didn’t like how much he wanted that.
"Tch. Don’t tell me you actually enjoy being exhausted," Sanemi scoffed.
Obanai tilted his head. "I enjoy quiet. And you tend to stop yelling once you sit down after a training session."
Kaburamaru hissed softly, as if agreeing.
Sanemi huffed, but the corner of his mouth tugged upward anyway. "Jackass."
Obanai didn’t reply, but something about his shoulders softened. Not visibly, not everyone could notice. But Sanemi caught it. He always caught the small things with Obanai. The little shifts in his tone, the way his gaze lingered a second longer, the nearly undetectable sighs.
That softening only lasted a moment before Obanai leaned back against the post behind them. His breathing slowed, the kind of steady inhale and exhale that came after pushing one’s body to its limit.
"You’re going to fall asleep out here," Sanemi said quietly.
"No, I won't," Obanai answered. A lie, and not a very good one.
"It’s late."
"Mhm."
"You should go inside before you conk out on the floor."
A faint hum.
Sanemi rolled his eyes. "Unbelievable."
He shifted, crossing his arms against his chest, letting his gaze follow the training field. The moon was rising behind the trees, casting long shadows across the cleared dirt. A breeze carried the smell of grass, soil, and distant cooking fire. It was the kind of night that settled under your skin.
He didn’t expect Obanai to lean.
It was slowly at first, like he didn’t realize he was doing it. His head tipped sideways, lightly brushing Sanemi’s bicep. Sanemi froze. Every muscle locked. His breath snagged.
Obanai didn’t move away.
Sanemi felt his weight, small, solid, and warm. Obanai always ran colder than most people, but today it was different. His hair brushed Sanemi’s shoulder, a few strands sticking to his own sweat.
Kaburamaru shifted to adjust his coil but didn’t protest.
"Hey," Sanemi said quietly, voice suddenly low, unexpectedly gentle. "Iguro. You’re... you’re dozing on me."
No answer.
Just the slow, deepening rhythm of sleep.
Sanemi swallowed hard. His face flushed light pink. He stared straight ahead, refusing to even turn his head because if he saw Obanai’s face unguarded, peaceful, trusting, he wasn’t sure what it would do to him.
His chest felt too tight.
He’d known for longer than he wanted to admit that something about Obanai’s presence steadied him. They trained well together and could sit in silence better than most pairs could hold entire conversations. And maybe, just maybe, Sanemi looked for him more than he should. Maybe he liked having someone who wasn’t scared of him or exhausted by him.
But saying that out loud? He’d rather swallow his own blade.
A few minutes passed like that. Quiet. The wind, the insects, the faint glow of the moon. Obanai’s breathing grew heavier. His shoulder settled more fully onto Sanemi’s. His head tilted until his forehead brushed against the curve of Sanemi’s neck.
Sanemi stopped pretending he wasn’t being affected.
It hit him suddenly, a plunging warmth in his stomach, a pressure blooming in his chest, the kind that made him want to both run and stay exactly where he was.
He sighed through his nose.
"You’re lucky Tokito or anyone else isn't here," he murmured. "You’d never hear the end of it."
Obanai didn’t stir.
Sanemi hesitated… then rested his cheek lightly against the top of Obanai’s head. His hair was soft despite the way Obanai always acted like bristles and blades. His scent smelt of sandalwood from his haori, something faintly sweet, and the familiar smell of sweat after training. It slipped into Sanemi’s lungs and stayed there.
He didn’t move. Didn’t want to.
Eventually Obanai shifted again, gently but unconsciously pressing even closer. His forehead slid against Sanemi’s collarbone.
Sanemi exhaled slow, shaky, and eventually gave in.
"All right… fine," he whispered. "Come here, then."
He adjusted his posture so Obanai’s weight fit snugly against him. With care, he lifted an arm and let it hover for a second over Obanai’s back before he finally lowered it, resting a hand between his shoulder blades. Obanai didn’t flinch or stiffen. He just breathed.
If anything, he relaxed even more.
Sanemi closed his eyes for a long moment. It was ridiculous how good this felt. To him, this was a dangerous feeling. Who knows how many hours of sleep he’d lose tonight thinking about the fact that Obanai Iguro, a impossibly guarded, chronically distrustful, and as sharp as a venomous blade was sleeping against him.
He trusted him enough to do it.
A long stretch of quiet passed before Sanemi finally let himself look down.
Obanai’s face was turned slightly toward him, the lower half still covered in bandages, but his eyes were shut and his brow that was usually furrowed was smooth. He looked so relaxed and vulnerable. The moonlight brushed across the bridge of his nose, catching the slight curve of it. His lashes were longer up close.
Sanemi felt something inside him tilt.
He lifted a hand, hesitantly… then brushed a stray lock of Obanai’s hair away from his eyes.
"You really don’t make anything easy, do you?" he whispered. "Not even something as simple as this..."
His voice wasn’t angry. Just full. So full.
He glanced toward the courtyard, it was still empty, before leaning the smallest fraction closer. Obanai wasn’t going to wake up, not in this state. He outdone himself for the last hour of their training, and Sanemi had seen how his stance wavered.
Sanemi brushed his thumb, very gently, against Obanai’s temple.
His face inched closer, and finally, he pressed his lips to Obanai's forehead.
Just a light touch. It was barely a kiss. More of a confession he’d never say aloud.
The contact lasted a heartbeat. Maybe two.
Then he leaned back quickly, jaw clenched, heart hammering louder than any demon roar he’d ever faced.
"Damn it," he whispered, not with regret but with the painful relief of finally letting himself feel what he’d been pushing down for months. "You’re going to be the death of me, Iguro."
Obanai murmured something unintelligible and nuzzled further into Sanemi’s shoulder.
Sanemi nearly choked on air. He was as red as a tomato.
But he rested against him anyway, letting the tension melt from his muscles. He tilted his head again, resting it lightly atop Obanai’s. The contact was solid and warm. Butterflies danced in Sanemi's stomach.
He wasn’t sure how long they stayed like that. It was long enough that night fully settled, and long enough that Kaburamaru fell asleep too.
After what felt like eternity, Obanai shifted and gave a small groan.
Sanemi stiffened and sat up straight immediately. "Oh? You finally waking up?"
Obanai didn’t lift his head. His voice came low and thick with exhaustion. "…How long was I asleep?"
"A while."
Obanai blinked slowly before realizing where he was resting. His gaze flicked up, eyes half-lidded, confusion bled into embarrassment. His ears turned bright red.
"You… let me stay...?" He whispered, as if that fact surprised him.
Sanemi looked away, grumbling. "You were dead on your feet. What was I supposed to do, throw you to the ground and leave you here?"
Obanai’s eyes softened. Just a bit, a warm flicker beneath the mismatched colors. "Thank you..."
Sanemi’s heartbeat accelerated even more.
"Tch. Don’t say it like that. Makes it sound like I did something heroic."
Obanai rolled his eyes lazily. He didn’t move away completely. He straightened enough to sit on his own, but his shoulder stayed touching Sanemi’s. Light contact, but it was deliberate.
The night felt different now, it was charged, quiet, full of something neither of them wanted to name.
After a moment, Obanai spoke again, softer this time.
"It was… nice," he murmured. "Resting next to you."
Sanemi’s breath caught and his mouth went dry.
He fought the urge to say something too honest.
"Yeah," he finally said, voice rough. "Yeah... It was."
He figured Obanai didn’t need to know about the kiss.
Not yet. Maybe one day.
For now… this was enough.
A quiet moment. A shared breath. A place to rest that didn’t feel like a battlefield.