The ramen shop was never in one place for long.
One morning it sat nestled between two convenience stores in Sapporo. The next, it was tucked into a hidden alley in New Delhi, the scent of spices mingling with the quiet sweetness of Tsuna's flame. Once, they landed near a coastal road in Malta, the sea wind tugging at the shop's red curtain like it wanted to peek inside.
Kawahira gave no warning when it shifted, and Tsuna didn't ask. He stopped being surprised weeks ago.
Still, he kept track of the little things. The ramen bowls stacked just so. The order of the prep list. The feeling of warm wood beneath his palms as he wiped down the counter before every shift.
He was used to impermanence now.
What surprised him more was the people.
Not regulars—not with how transient the shop was—but patterns. People who looked exhausted, hollowed out by life, but softened the moment they stepped through the curtain. The kind of people who didn't need much: a hot meal, a quiet seat, and someone who didn't look through them.
They didn't know it, but it was Tsuna's Sky Flame that did that.
Kawahira told him so one night.
"You ground the space," he'd said, voice calm as he cleaned a ladle. "People feel calm when you're here. Less burdened. The Flame doesn't just harmonize—it stabilizes. Like pressure easing off the soul."
Tsuna hadn't known what to say to that, so he'd just nodded and kept drying the bowls.
Still, as the weeks passed, something inside him frayed.
Not in a dramatic way—just little things.
The ache of silence when he went upstairs to sleep. The strange feeling of laughing at a customer's joke and realizing no one else would remember it. The way his hands stilled every time his phone buzzed, hoping it was someone who wasn't a stranger.
Yuni messaged sometimes. Light check-ins.
"Hope the shop hasn't ended up in Antarctica this time. ❄️"
"Got a new pacifier polishing cloth—mint green! I think Verde's finally rubbing off on me."
"Byakuran agreed to meet. He's busy this month but says he's looking forward to it. Sending his number now 💌."
Byakuran had replied within minutes when Tsuna messaged him.
"Uuuuugh, thank god you messaged me, I've been buried under Gesso paperwork for WEEKS 😭😭😭 pls tell me you have a cure for being a responsible adult."
It felt absurdly natural, like talking to an old friend he hadn't seen in years—even though they'd never spoken before.
Tsuna had even called him once, when the shop landed in Italy and Kawahira sent him out for groceries.
Byakuran picked up immediately.
"Ciaooo~ Tsunayoshi-kun~!"
Tsuna had barely greeted him when Byakuran launched into a half-whined rant about how hard it was to be the Gesso heir.
"You know, it was so much easier in that other world. I just conquered everything and sat on my flaming throne like a drama queen. No reports, no meetings, no paperwork."
"Sometimes I wonder if I should just do it again. Ieyasu's not even that strong—"
"—but then I think of you, and how disappointed you'd be in me, and ugh, I just can't. It's tragic."
Tsuna had paused at that, startled. "Me?"
"Of course! You're you. Even if this is technically the first time we've met. Your flame still feels the same. It's always so… steady. You make tyrants feel guilty just by existing."
Tsuna could almost hear the pout in his voice.
He smiled, quiet and tired but genuine. "I'm flattered. I think."
"You should be!" Byakuran chirped. "You're stabilizing me, and I haven't even seen your face yet!"
That had made Tsuna laugh, and it lingered with him long after the call ended.
Back in the ramen shop, Tsuna served another bowl to a traveler who barely looked up from her drink. She murmured thanks. He smiled. Another invisible soul momentarily eased.
But later, as he sat by the window, watching the sun set over an unfamiliar skyline, he rested his forehead against the cool glass and thought:
I'm still here. But I feel like a guest in the world.
.
Tsuna had known something was wrong.
The last few days had been strange—he'd been training less, sleeping more. He felt unbalanced, like his skin didn't fit right and the air was too heavy around him.
He'd blamed it on the shifting nature of the ramen shop. On loneliness. On the emotional weight of waking up in the wrong world, in a body that remembered being unloved.
He hadn't thought of this.
It began on the way back to the shop.
He'd only gone out for a walk, maybe to jog if his legs had cooperated, but a third of the way through he was already too warm. His clothes clung to his skin, damp from sweat that smelled faintly sweet, sharper than usual. It didn't help that his sense of smell felt like it had been turned up—every step filled with too many scents, too strong, too clear.
By the time he returned, his head was heavy and his breath shallow.
He showered immediately—cold water, hoping it would settle the heat in his body—but it only dulled it. His skin still prickled with discomfort, his muscles feeling boneless and tight at once.
I must be getting sick, he thought as he towel-dried his hair with unsteady fingers. But the book Kawahira had given him weeks ago was echoing in the back of his mind now, phrases rising like static between each breath.
"Heats can be triggered early under emotional or physical instability."
No, he thought. Not this. Please not this.
Still in his sleep clothes, he made his way down the stairs—gripping the banister tighter than he liked to admit. The lights were low in the shop, warm and golden like always. Kawahira sat at the counter with his usual cup of tea, calmly sipping, his eyes closed in that way that said he was listening anyway.
Tsuna only made it halfway down before he froze.
He smelled something.
Not food, not miso broth, not the soft florals of the cleaning soap they used. Something subtler.
Warm.
Earthy.
Old paper and sandalwood.
Not sharp or commanding like the alphas he'd passed on runs. Not heavy.
Just present. Real.
Kawahira's scent.
He staggered slightly on the step, disoriented by how sharp it was now that his senses had tilted. He reached out to steady himself—only for the motion to draw Kawahira's gaze.
Their eyes met.
Kawahira took one look at his flushed face, sweat-slick skin, and unfocused expression and sighed.
"So," Kawahira murmured, setting down his cup, "it's begun."
He rose with quiet grace, crossed the floor, and met Tsuna at the base of the stairs just as his legs threatened to buckle.
A cool hand steadied his elbow. Tsuna flinched—but leaned into it despite himself. His nose brushed against the sleeve of Kawahira's kimono, and—
Comfort.
Soothing warmth, like incense smoke and early autumn. He pressed closer, mortified as he felt himself nuzzling. His body did it on reflex.
"I— I'm sorry," Tsuna muttered, lips barely forming the words. "I don't know why I— I just…"
"You're starting your first heat," Kawahira said simply.
Tsuna stilled.
The haze didn't lift, but a flare of clarity cut through the fog in his chest like a thread snapping tight.
"Oh," he whispered. "Oh…"
His face burned hotter. Not from the fever now—but shame. Humiliation. Fear.
"I—"
Kawahira, as ever, did not scold. Did not draw attention to Tsuna's trembling.
"You'll lose coherence soon," he said gently. "Better to lie down now, before it worsens."
He began guiding him up the stairs again. Tsuna followed numbly.
"Stay in your nest. Don't leave the bed unless necessary. I'll bring water. Small meals. You may sweat through your sheets—don't be alarmed."
"I don't… I don't have a nest," Tsuna managed.
"Your bed is your nest, for now," Kawahira said, not missing a beat. "It smells like you. It will be enough."
Back in his room, Tsuna sank onto the mattress, shivering despite the heat crawling under his skin.
Kawahira moved efficiently, pulling a bottle of water from a drawer, setting it beside the bed, then folded a small towel and laid it within reach.
"I'll come by in a few hours," he said.
He turned to go, but paused in the doorway.
"You're not broken, Tsunayoshi. This is normal. Messy. But normal."
Then he was gone.
The door clicked shut behind him, and Tsuna curled under the blankets, hands fisting in the fabric.
Normal, he thought.
But even now, he didn't feel like himself.
Still—maybe that was the point.
.
The fever hadn't broken yet.
The room was humid, the air thick with Tsuna's scent—honey-sweet and raw-edged, like something bruised and blooming. The sheets clung to him. His hair stuck to his forehead. His breathing was steady but shallow, like he wasn't fully inside his body anymore.
Still, when the door creaked open, he stirred.
His eyes blinked open slowly, foggy gold irises focusing not on sound, but on smell. That quiet, grounding scent—paper and sandalwood, incense and stillness—Kawahira.
He exhaled, shaky but relieved.
Kawahira stepped in with quiet grace, carrying a bowl of clear soup in one hand, a fresh bottle of water tucked under his arm. He didn't speak at first—just approached the bed, set everything down on the nightstand, and gently sat beside him, the old mattress dipping only slightly under his weight.
"You're awake," Kawahira said quietly.
Tsuna gave a tired nod, barely lifting his head.
Kawahira slipped an arm behind him, carefully lifting him upright just enough to help him drink. The first few sips were slow, Tsuna's mouth sluggish around the spoon, but the warmth of the broth helped. Grounded him.
He drank in silence, letting the careful care happen. When the bowl was half-empty, Tsuna finally murmured,
"Thank you…"
Kawahira gave no response, but he didn't pull away—just eased Tsuna back onto the pillows, gently brushing damp hair off his forehead.
He stood to leave.
And that's when Tsuna reached out.
His fingers trembled, but he grabbed hold of Kawahira's sleeve—weak, desperate, and far too honest.
"Don't go," he said.
Kawahira paused mid-step. His expression flickered—not with annoyance, but with something far more difficult to define.
He turned, looking down at him with a faint frown.
"Tsunayoshi," he said calmly, "as an Earthling, I'm not as susceptible to hormonal fluctuations as most humans. My will is… stronger. Stable. Your scent won't influence me."
Tsuna blinked slowly, still clutching the fabric.
"Then stay," he whispered.
Kawahira shook his head, not unkindly.
"That's not the problem. Your body—your instincts—are searching for reassurance. Lacking family nearby, they're defaulting to the next source of perceived safety: an alpha."
Tsuna didn't answer. Just kept holding on.
"Even if I don't respond," Kawahira continued, "proximity will still intensify certain symptoms. You'll become… aroused. Physically reactive. And though I will control myself, it is not wise."
Tsuna's eyes welled up without warning. Heat gathered behind his lids and spilled quietly onto his cheeks. He didn't sob, didn't whimper—just leaked pain like a hairline crack in porcelain.
"I don't want to be alone," he whispered.
It wasn't pleading.
It was honest.
Kawahira sighed. A long, quiet breath. Then he sat back down beside the bed, folding his legs neatly beneath him.
"I'll stay," he said.
He didn't touch him. Didn't reach for his hand or offer empty words. He simply… stayed.
Tsuna curled toward him, still clutching the sleeve in his fingers. His breathing evened out, lips parting with a small, half-conscious sigh.
And soon, he was asleep again.
Still hot. Still trembling.
But not alone.