Actions

Work Header

Resonance in the Steam or MC, Caleb and Zayne's Big Ol' Resonating Hot Springs Trip

Summary:

Set a few months before the start of the main story.

Grandma Josephine, noticing how hard her adopted granddaughter has been pushing herself through hunter training, books a hot spring trip so the girl can finally relax. Accompanying her: the two men who served as fragments of her childhood , Caleb, home on leave from the academy, and Zayne, the heart surgeon who's quietly stepped back into her life.

She's blissfully oblivious to the tension simmering between them. She has no idea it traces back to an accident she doesn't even remember.

And of course, of course, there's only one room. Three days. Two men who can't stand each other. One girl caught between a cold front and a warm one.

They'll learn about each other. They'll steal a little peace. They'll soak in the steam and pretend the standoff isn't happening.

Before the world that was always against them comes crumbling down.

Notes:

I wonder what shenangians they will get into. Also what a tragedy she gets to spend three days with angsty, hot men.

Chapter 1: A Heavy Frosted Reunion

Chapter Text

The cold, clean mountain air greeted them as the train sighed open. They stepped on the platform, and Caleb breathed like a man who had been holding his breath since Skyhaven.

Three weeks of flight rotations, recycled cabin air, nights spent staring at the bunk ceiling, counting down when he could leave, and now he was here, for three days, time was to be spent in the space of a hot springs resort, three days spent with the dark-haired girl next to him.

 

Her.

 

"You ready to clear your pores, pipsqueak?" He slung an arm out toward the view, grinning that easy grin that had charmed half of DAA and rejected every homemade lunch that came of it. "Gran said relax. I intend to relax aggressively. I'm gonna come out of that water so smooth, babies will weep."

Her laugh, the one she reserved for him, rang out. She crinkled her nose and shouldered past him toward the steps. "I'm more worried about you, honestly. Hot water with that chicken skin of yours? You'll probably come out looking more like a plucked bird. We should've packed more lotion."

"It's keratosis pilaris, and for your information, it's a perfectly common-" He gave up due to her continuous cackling, and did the only dignified action available to a man being mocked by his favorite person, he ruffled her hair, dragging his knuckles across her scalp until she shrieked and swatted at him. The bag swung, and a mouse ran in a nearby tree. For one bright second, the late morning belonged to the two of them, lazy and uncomplicated, exactly what he pictured staring at the dull of the academy's ceilings.

 

A voice pitched across the platform, dry and unhurried, which immediately crumbled Caleb's contented musings.

 

"Oh. You showed up as well."

 

The grin didn't leave his face so much as freeze onto it. He turned.

 

A man stood near the station's far pillar in a charcoal three-piece, an outfit that had no business at a hot spring, a single leather case neatly at his heel, the silver wire frames faintly hazed where warm air met the cold, and he carried with him everywhere. He looked as he always did, a man who'd arrive prepared for any circumstance. There was no smile etched on his face; he rarely performed that, especially around Caleb.

 

"What are you doing here?" The tone from the pilot still carried warmth; anyone passing would have heard it as a friendly greeting between acquaintances, but the words landed flat and square, the hand that had been ruffling her hair settled instead lightly at the back of her neck. He didn't grip the skin; rather, he let the hand linger as a presence.

She already turned, her face lit up, and quickly moved out from under his hand, before he could close his fingers, darting across the platform, throwing her arms around the Doctor's neck the way she threw herself at anyone she cared about, without hesitation, without strategy.

 

"Zayne!" She pulled back to look at him, beaming, hands still on his shoulders. "What- is this Grandma's doing too?"

 

Something crossed Zayne's face from her touch. A small thing, quickly governed: the brief stillness of a man recalibrating, of cold meeting warmth and choosing, with effort, not to flinch away from it. His hands stayed at his sides for exactly one breath longer than was natural. Then, carefully, as though setting down something he'd been afraid to hold, he let one settle at her back.

 

"It seems so," he said. "She invited me under the guise of a childhood reunion." A faint, dry pull at the corner of his mouth, the closest he came to wryness. "The hospital didn't object. They're forever telling me I take too few days." His gaze flicked down to her, clinical and not clinical at all, snagging the way it always snagged on the small, fierce rhythm beneath her sternum. "And it gives me an excuse to monitor your heart under the steam and the heat. The combination is harder on the cardiovascular system than people assume. At altitude, especially. Someone ought to be watching you. I just was not expecting...another guest."

 

His feet planted in the steel of the platform, Caleb said nothing, the grin still plastered, the purple eyes almost twitching. Someone ought to be watching you. He let the sentence sit and let his mind trace back to the years, to a smaller version of his "sister" lying in a hospital bed, bandaged, Grandma standing over, her expression furrowed in worry, and the quiet, clever boy who had done it standing white-faced in the doorway, and how that boy simply left, moved cities, a remnant of their lives. But then a decade later, he came back with a medical degree and a stethoscope, a promise to watch her condition, to press his hands against the most defenseless part of her once a month and call it care.

 

"Huh," Caleb said instead, light as anything. "Gran really went for it. Three of us, then." The grin widened, all warmth, all teeth. "Better book a bigger room."

 

"They've assigned us separate ones, I'd imagine," Zayne quipped.

 

"Sure. Course." Caleb's gaze met the Doctor's over the top of her head, a whole silent conversation conducted entirely in the things neither of them would ever let her hear, and then he broke it with a roll of his shoulders and a tilt of his chin up the lantern-lit steps. "Well. Come on then, Doctor. Wouldn't want her cardiovascular system getting any ideas on the walk up."

 

She glanced between them, oblivious as sunlight, still half-tangled in the easy gladness of being surrounded all at once by the two people she trusted most in the world. "We haven't spent time together in so long," she said, falling into step, reclaiming her bag she left on the steel ground. "This is going to be so nice. The three of us. Like when we were kids."

 

Neither man answered that.

 

The steam rose off the terraces ahead of them, sweet with mineral and pine, and the lanterns came on one by one against the deepening blue, and they climbed the hill together, the woman in the middle, bright and unknowing; the pilot on her left with sunshine in his face and something tightly folded behind it; the surgeon on her right, cold radiating faintly off his charcoal sleeve, watching the place beneath her collarbone where her borrowed heart kept its quiet, stubborn time.

 

The attendant met them at the top of the lantern-lit steps with a bow and a smile and a tablet she never once consulted, launching instead into a recitation she'd clearly given a thousand times, the mineral content of the springs, the silica that left skin like silk, the dissolved metaflux trace that the brochure claimed harmonized one's inner Evol with the rhythms of the earth, which made Zayne's mouth flatten by a millimeter in the particular way it did when someone said something unscientific with confidence.

 

"...and our east-facing spring is said to be most beneficial for matters of the heart," the attendant beamed, leading them along a corridor of dark polished wood, "as the mineral composition is believed to soothe the circulation and calm the spirit, perfect for couples seeking to reconnect, or for-"

 

Caleb tuned her out somewhere around harmonize and turned, instead, to watch her walking between them, and found that she was observing the two of them, glancing left to right and back again, and that whatever she saw on either side of her had drained the easy gladness right out of her face.

 

Because they were both, very quietly, seething.

 

Not at her. Never at her. But she could feel it the way one feels a storm before the sky changes, Caleb's grin gone tight and brittle at the edges, his jaw working, sunshine stretched too thin over something that wanted to bite; and on her other side Zayne radiating that faint dry cold, his silver frames catching the corridor light, his whole body held in the rigid quiet of a man biting down hard on whatever he wasn't going to say. They weren't looking at each other. That was the worst part. They were pointedly not looking at each other, and the not-looking filled the corridor like smoke.

 

The tense energy rattled her, and her grip slipped; her oversized bag slid off her shoulder.

 

Two things happened at once.

 

"Allow me." Zayne's hand was already there, catching the strap before it hit the floor, fingers brushing hers.

 

"I got it." The bag lifted effortlessly off the polished wood on its own, weightless. Caleb's eyes flickered with the soft pull of his Gravity Evol as he floated the thing neatly up and over to settle on his own shoulder, smooth as a magic trick, smug as a cat.

 

She looked between them. Doctor's hand half-extended. Pilot's eyes still glowing faintly violet.

 

"Uh, I can carry my own bag," she protested.

 

"Really?" Caleb's brows shot up, the grin going from brittle to wicked. "You? The girl who dropped it thirty seconds ago?

 

"I was...preoccupied."

 

"It was just now. It was literally just now, I watched it happen with my own two eyes-"

 

"You are so ridiculous sometimes." She shoved at his shoulder, exasperated and helplessly fond, the storm in the corridor breaking just enough to let her breathe. " But thank you. Both of you, even though again I have two perfectly working arms."

 

Zayne's mouth tightened. He withdrew his hand and tucked it back into his coat pocket, saying nothing, and something in the set of his shoulders said he'd lost a round he hadn't known he was playing.

 

The attendant, blessedly oblivious, slid open a paper-paneled door. "And here we are! Your room."

 

They froze.

 

"...Room?" She stepped past the threshold and stopped. One broad space opened before her, compressed straw floors, a low table, a wide-laid sleeping area with a bed, pillows, and covers fluffed and soft, a single deep window looking out on the steaming terraces and the dark pines beyond, and a couch along the near wall, and a single sliding screen to a private bathroom. Lovely. Warm. Singular. "Not...rooms? Plural?"

 

The attendant looked down at the tablet she'd been ignoring this whole time, and her smile faltered. "Oh, my apologies. Let me...ah. It seems under the reservation name Josephine, only one room was booked." She looked up, reading the dawning horror on three faces, and added, with the trained brightness of someone fleeing a scene, "I'll just fetch fresh towels for everyone! Plenty of towels!" And she was gone, the door whispering shut behind her.

 

Silence.

 

Caleb went red to the tips of his ears. Zayne, who blushed the way glaciers calve, slowly, and at the very edges, developed a faint stain of color high on each cheekbone and stared fixedly at the window as though the pines had personally wronged him.

 

"Did Josephine make a mistake?" Zayne spoke. Carefully. To the window.

 

"Damn it, Gran." Caleb dragged a hand down his face, his own duffel thumping off his shoulder onto the couch. "She, okay, she probably couldn't swing three separate rooms, the place isn't cheap, so she figured one big one with the couch could work." He exhaled through his teeth. "I wish she'd just told me. I'd have covered the difference. She didn't have to make it a surprise."

 

"It is not an issue." Zayne turned from the window, already reaching into his coat for his phone, voice clipped back into competence. "I'll book another room. Two, if they have them. It's nothing."

 

And in the in-between of both of them moving to fix the situation, to spare her even a moment's awkwardness, she stood in the middle of the single room, and felt, underneath the embarrassment, something ached a little.

 

Even with their uneasy presence in the hallway, she noticed something she almost suspected was some sort of contention between the two men; the truth was, she barely saw them. Not in years.

Caleb was a voice on the phone from Skyhaven, a face at the holidays, this trip could give him to her, before the academy swallowed him again. Zayne, she saw more often, but even then, he was just a clinic visit with a clipboard and stethoscope, still a stranger she half-knew wearing the face of a boy she barely remembered.

Grandma spent good money; she didn't have to put the three of them on a vacation, a mess already sure, mortifying, but the effort, the love, Josephine reaching across the distance to stitch her scattered little family back into one place for once.

 

"It's fine," she blurted out, before Zayne could dial. "Grandma, she wanted this. She wanted us all together. Don't undo it the second we walk in." She looked around the room, at the wide bed and the long couch by the wall, and shrugged with a determined cheer. "Look, there's a couch. One of us can take it; it's no big deal. I can! I'll take the-"

 

"No."

 

The word came in stereo. Both men. Instantly. In perfect, appalled unison.

 

She blinked.

 

"Absolutely not," Caleb said, recovering first, the protectiveness flaring up through the embarrassment like a struck match. "You have a heart condition, and you've been training yourself into the ground for months, you're not sleeping on a couch, are you out of your mind-"

 

"You require proper rest." Zayne, overlapping, pocketing the phone again, his clinical voice doing nothing to hide the fact that he and Caleb had just agreed on something for the first time in years, and neither of them had noticed. "The couch. Non-negotiable. Your cardiovascular recovery alone-"

Caleb kept the smile, his fingers clenched into a fist.

 

She stifled a laugh. Zayne continued

 

"-and the elevation affects your circulation, which means you of all people should not be-"

 

They both stopped.

 

Looked at each other.

 

Realized they were, for one unbearable second, on the same side.

 

The realization seemed to physically pain them. Caleb's jaw clicked shut. Zayne looked away first, back to the long-suffering pines, and the temperature in the room dropped a fraction that had nothing to do with the open window.

 

She looked between them, her warm sunny brother and her cold, quiet Doctor, both flushed, both fuming, both having just declared in a single voice that she was the one thing in this room they refused to let take the worst bed, and felt that strange ache turn over in her chest again, beneath the borrowed rhythm of her heart.

 

"...Okay," she said slowly, a smile tugging at her mouth despite everything. "So. Two of you, one of me. One couch. One bed." She set her hands on her hips. "We'll figure out something, maybe a fight...maybe a competition. Loser gets the couch."

 

Neither of them looked away from the window or the wall.

 

Neither of them said that they'd each have slept on the floor, on the bare stone of the spring, in the snow, before they'd have let her spend one night less comfortable than she deserved.

 

Some things, in that room, still went unspoken.

The paper map of the resort grounds was the kind that came laminated and badly folded, and MC spread it across the low table with both palms, smoothing the creases, already lit up with the particular delight she brought to itineraries.

 

"Okay, ooh." Her finger landed on a dotted line winding up into the hills. "There's a trail where you can watch the meteor showers from a ridge. We have to do that, that's non-negotiable. And, a full robot assistant service, fancy. And oh-" the finger skated down the column "-full dinner, lunch, and breakfast service, plus mini snacks anytime, that's okay, Grandma really did pick the good package." She leaned closer, scanning, and then her whole face brightened. "Hey, Caleb. They stock that sour candy you like. The disgusting one. The neon one that turns your tongue."

 

"It's got character," Caleb said from the wall, the easy grin sliding back into place at the sight of her happiness. "Great. Excellent. I'm going to ruin my mouth on principle."

 

"Of course you are." She turned the smile, then, across the room, gentler at its edges. "And looks like there's something sweet for you, Zayne, they've got a whole dessert service. But you'd better watch that tooth of yours, I'm not driving down a mountain at midnight because you couldn't resist the dessert cart."

 

Zayne, who had been standing by the window with his hands tucked into his coat as though he hadn't quite decided to fully arrive yet, met her look. The faint color hadn't entirely left his cheekbones.

 

"I can withstand it," he said, with the grave dignity of a man defending his honor over a pastry.

 

She laughed at him, at the absurdity of withstanding a dessert cart, and the sound seemed to ease something in the room. "Sure, you can." She straightened, stretching her arms over her head until her spine cracked, and grabbed her smaller bag. "Okay. It's too early for any real hot spring action. I'm going to freshen up, splash some water on my face, and let's raid that lunch service, because I've eaten one pastry since this morning and I'm about to start gnawing the furniture. You two, relax, you're acting as if we discovered a den of wanderers." She said it lightly, a joke, opening the bathroom door and shut behind her with a soft clack, having no idea how near the bone it cut.

 

The water ran on the other side.

 

For a moment, neither man moved.

 

Then Caleb spoke, low, not looking over. "Hey," he ran a hand through his hair. "Look. I want to make sure she actually enjoys this. She's been working herself to the bone at that training program, heart like hers, and she still won't slow down, you know how she is, and I want this trip to be something good. She deserves it, you don't know what she's been..." His mind wandered to her as a child in the research center, wincing in pain after one brutal experiment, how he comforted her, which didn't matter as they simply wiped her memory the next day, which triggered his devotion to her. He cast his eyes down. "She needs three days that are just nice."

 

"And you imagine I don't want that," Zayne said. Quiet. To the window. "After all these years, she is still someone I care for. As a patient. As a friend. I did not come up a mountain in a suit, Caleb, to ruin her trip."

 

That word, care, did something to Caleb.

 

He peeled himself off the wall, slow, deliberate, and the grin that had carried him through three weeks of flight rotations and one ambushed afternoon finally slipped its leash.

 

"Yeah," he said. "Care." He let the word hang there, turned it over, and set it down between them like a card. "Maybe your memory's gone fuzzy, busy man, lots of surgeries, but you seem to have forgotten the part where your care pierced a spike of ice and missed her heart by about an inch. She was in the hospital for weeks, Zayne. Gran thought she was going to die. Then you just packed up and left."

 

Zayne's eyes narrowed behind the silver frames. The temperature in the room dropped, the window beside him beginning to bloom faint feathers of frost at its lower corner.

 

"That was a long time ago," he said, and his voice had gone very level, the dangerous flatness of a man holding something down with both hands. "I was a child. I could not control it. I did not even understand what I-" He stopped himself. Recalibrated. The frost crept another inch. "That is why I became what I became. A surgeon. A heart specialist. So that these hands would learn to do the precise opposite of harm. So that the most they could ever do near her again is help."

 

"Help." Caleb huffed a soft, humorless laugh and folded his arms across his chest, his violet eyes very steady. "Then help by staying in your lane, Doctor. Monitor her heart rate, write your charts, and keep the appointments. That's the lane. That's all I've got to say to you."

 

A silence. The water, still running behind the screen.

 

And then Zayne tilted his head, just slightly, regarding the pilot with that cool dissecting attention he usually reserved for an X-ray, looking past the warmth, past the grin's wreckage, at the thing underneath it.

 

"You are very attentive to her," Zayne observed. Mild. Almost pleasant. Which was infinitely worse than anger. "For a brother. It feels, though, a different kind of attentiveness." The faintest pause, surgical, finding the seam. "Interesting."

 

Caleb's arms dropped. The easy line of his shoulders went taut, and the air around him seemed, briefly, to weigh more, the soft pull of his Gravity Evol leaking out at the edges of his control, the low table giving a faint groan as though something pressed down on it. His mouth opened.

 

The door opened.

 

"Okay!" She emerged, face freshly washed, dark hair pushed back damp from her temples, utterly radiant and utterly oblivious to the frost still ghosting one window and the weight still ringing the table. She planted her hands on her hips and looked between them, pilot rigid by the table, Doctor cold by the glass, both of them snapping their attention to her at once like guilty schoolboys. "What are you two even standing around like that for? I said relax, not hold a staring contest. Come on, I'm starving, the lunch service waits for no one!"

 

She was already crossing to the door, already reaching for the handle, already gone past whatever had just happened in her three minutes' absence.

 

Caleb's shoulders came down. The weight lifted off the table. The grin came back for her, only ever for her, easy and warm and seamless, like he hadn't just been a breath from saying something he couldn't take back.

 

"Coming, pipsqueak," he called, and shot Zayne one last look as he pushed off toward the door.

 

Behind them, by the window, Zayne exhaled slowly through his nose. The frost on the glass began, grudgingly, to recede. He straightened his cuffs. He aligned his glasses with one knuckle. And he followed the two of them out into the lantern-light, into the already long noon, into three days of warm water and the things none of them would say a man who had spent years learning to keep his hands from hurting her, walking a half-step behind the brother who had never once let him forget that he'd failed at it the first time.