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to pinky-promise that you'll never lie

Summary:

“I am just… I am not certain about how much I have… done before.” Wave admits, embarrassed. “I… I think I have kissed before, but I cannot be sure.”

“You’ve definitely kissed someone before.” Lava says casually. Wave blinks at him a couple of times, and shifts a bit to get more comfortable while talking. Lava’s nonchalant attitude is cut short when he groans, just as Wave realizes exactly where he’s sitting. He feels his face heat up as he moves himself into a safer position. After he recovers, Lava explains, “I wasn’t sure yesterday, with the way you tensed. But now… I think your body remembers it, right?”

-
Or, what happens after the fade to black on ep 4

Notes:

Hello!!
There's not enough LavaWave fics, so I wrote one myself!! I'm not used to writing smut so you'll have to forgive me if it's too awkward. English is also my thrid language, so tell me if there's any mistake!!

Title from Chappell Roan's School Night.

(See the end of the work for more notes.)

Work Text:

Wave shifts carefully on Lava’s lap, trying to get their bodies even closer. The heat of the contact is both comforting and scary. The feeling of the kisses they just shared still lingers softly on his lips, threatening to make his chest explode with a mixture of excitement and hesitation.

It feels like his chest hasn’t stopped fluttering since last night, when Lava kissed him for the first time.

Wave’s hands tremble slightly on Lava’s shoulders; the warmth beneath his palms feels both familiar and completely new. He rests his forehead against Lava’s and breathes in. The smell of salt and sweat hangs in the air, a lingering reminder of the pier and, therefore, his bravery.

He’d kissed Lava, something he had found himself wanting to do all day.

It both infuriates and excites Wave how perfectly Lava’s name fits him. He’s brash and unapologetically himself: a hot, irritating, confident mix of an asshole; but also shares his body with this comforting, selfless boy who wants to feel useful.

And even if his methods are… questionable, he’s definitely helped Wave. Apart from saving his life. For one, he’s now sure he’s 100% gay, and he has a feeling his past self, the one with all his memories, had known that. He feels a small sense of… almost shame, every time he does something like what he’s doing right now: sitting shirtless on another boy’s lap. His chest feels sticky from Lava’s spit, where he’d left countless kisses a minute ago.

That guilty feeling, however, is just a small distant worry; not present enough to stop him at all.

As Lava slowly moves his hands freely through his back, Wave leans down to kiss him again, tangling his hand in the other’s hair and pulling, moving his head to guide him to the perfect angle.

I thought I’d be shier in moment like this, he thinks to himself.  And that makes him wonder. Has he ever kissed someone before? Has he made out with anybody? Has he ever done… whatever else Lava and he are about to do right now?

Lava breaks the kiss only to leave a trail of slow and wet kisses from the corner of Wave’s mouth down to his jaw, his neck, and where it meets his shoulder, where he lingers. Meanwhile, eyes still closed and now feeling a small frown forming, Wave tries to concentrate on the feeling and determine whether he’s ever felt this before.

His memory is completely blank, and even if his body is on fire, clearly excited and affected by Lava’s ministrations; he thinks this doesn’t feel exactly unfamiliar. Maybe he’s kissed a girl and realized he didn’t like it? Maybe he–

“You’re stiff, nong.” Lava’s lips brush against his skin, his voice somehow both teasing and soft, before pulling away to look Wave in the eyes. He snorts. “You look like you’re trying to solve a math problem.”

Wave exhales shakily and realizes he’s even more affected than he thought. “I just…” But he’s a bit too embarrassed to finish the sentence.

Lava must mistake his shyness for hesitation. “You’re gonna give yourself a headache, Ai Wave.” He slowly removes his hands from Wave’s back. Wave misses the warmth instantly.

Now with a small worried frown on his face, Lava moves one hand behind himself, supporting some of his weight and putting more space between their upper bodies. The other comes up to caress Wave’s cheek.

“We can stop, you know.” Lava tells him, no trace of teasing. “You don’t have to force yourself to do anything you don’t want to.”

Wave clicks his tongue, because that’s the last thing he wants. He makes a show of rolling his eyes and moves to press a soft kiss to Lava’s lips, then to his chin.

“It is not that,” he says in the little space between their mouths. “I am just… I am not certain about how much I have… done before.” He admits, embarrassed. “I… I think I have kissed before, but I cannot be sure.”

“You’ve definitely kissed someone before.” Lava says casually. Wave blinks at him a couple of times, and shifts a bit to get more comfortable while talking. Lava’s nonchalant attitude is cut short when he groans, just as Wave realizes exactly where he’s sitting. He feels his face heat up as he moves himself into a safer position. After he recovers, Lava explains, “I wasn’t sure yesterday, with the way you tensed. But now… I think your body remembers it, right?”

Wave gives a small, unsure nod, a faint smile forming.

Is Lava saying Wave is… good at this?

“I think so, too.” Wave agrees.

He lets Lava press another soft kiss, which lingers for a few seconds, their lips moving together pleasantly, as if they’ve done this countless times before.

“See? You’ve got this. Let’s see what else your body knows how to do.”

Wave doesn’t dignify the other’s tone, back to his usual teasing, and decides the conversation is over.

As Lava has said, his body knows what to do even if his mind does not.

Wave tries to focus on the sensations instead of the questions, letting his body do as it pleases as he catalogues his reactions. He kisses and lets himself be kissed, pressing close to Lava and anchoring himself in the moment.

He knows their relationship is far from perfect, their dynamic too teasing and unstable, but Wave knows that whatever he is feeling is real. And he is certain Lava is on the same page, even if he doesn’t want to talk about it.

Every touch and movement from the other is deliberate, confident, and reassuring all at once. The way Lava smiles at him, soft and caring while pressing him even closer, makes Wave’s stomach dance in ways he does not fully understand. Even so, he knows for certain that he is safe. Lava is the one who saved him and has been taking care of him since then, after all.

He can trust the parts he remembers, and for the rest… he can trust Lava. That’s enough.

Even if Lava swears he is indifferent… Even if Wave wants to punch him as much as he wants to kiss him most of the time…

Now, leaning into the other boy, tasting him, feeling the way Lava’s lips deepen the kiss beneath his, Wave is acutely aware of the intimacy they have built in such a short span of time.

Lava’s hands, which had been exploring his torso, find their way to Wave’s lower back, strong and warm. Wave’s hands are still tracing random patterns on the other’s neck and shoulders when he realizes he is slightly moving his hips against Lava’s. Grinding slightly against the other, he feels a flicker of recognition and a small thrill that makes him flush.

Lava exhales profoundly as his hands, strong and warm and so slow, drift lower until they are on Wave’s behind. Grabbing his ass with both hands, Lava tilts him slightly, guiding his movements. The pressure makes Wave’s breath hitch, especially when he opens his eyes (which he hadn’t realized he’d closed) and sees Lava’s focused on his, eyes dark.

It’s then that Wave realizes this: hands on him so intimately, the direct pleasure on his groin, it is definitely new.

Lava seems to read him perfectly. “You okay?”

Wave takes a few breaths while nodding. “Yes.” His voice sounds weak, but Lava doesn’t make fun of him, so he counts it as a win. “I am quite sure… I have never gone this far before.”

Lava nods, and Wave can hear his next words before he even starts. “Maybe—”

“I want to continue,” Wave interrupts him. Lava looks surprised for half a second before he quickly transforms his expression into a playful grin. “I– I want to do more, but maybe not… everything.”

He whispers the last part while averting his eyes from Lava’s face, a bit ashamed to be saying this to someone who clearly is quite knowledgeable about this things.

Lava makes a small sound with his tongue, almost like a reproach, and moves one hand to Wave’s chin, forcing him to look at him again.

“That sounds good.” His tone is as playful as his smile, but it doesn’t feel like mockery. His thumb brushes along Wave’s skin in a gesture that’s both casual and deliberate, a mixture of reassurance and claim. “We can’t go all the way, anyways. I don’t have condoms here,” Lava explains. “I’ll have to buy some for next time.”

The notion of this not being a one-time thing (or ‘one-night thing,’ as Lava had said before), of Lava planning to repeat this in the near future… Fills Wave with a pleasant wave of warmth and bravery, which makes him bold enough to say, as cheeky as he can muster, “Next time, huh?”

“Shut up,” Lava says hoarsely, moving his hips up to knock the air out of Wave’s lungs. He succeeds. “You were the one moping all day about wanting to kiss me again.”

He’s got me there, Wave thinks. But he’s not going to give Lava that small victory, so instead he says,

“Then make it good enough for me to want to repeat this again, too.” He says it with all his bravado and a smug shrug of his shoulders.

“Whatever my princess wants,” Lava says teasingly. And somehow, Wave’s body recoils at the nickname.

“Do not call me that again,” he orders as he leans down and captures Lava’s lips once more.

For a long moment, they stay like that, exploring and teasing, with Lava guiding their hips gently, nudging and pressing just enough to make Wave’s body respond instinctively, without ever rushing. He feels something fragile and powerful stir within him—something he cannot name but wants to explore further.

Before he knows it, Wave’s back meets the cool sheets as Lava moves on top of him, pressing down gently. The change in perspective makes his pulse quicken again. Lava’s hands frame him, one brushing along his jaw, the other supporting his weight next to Wave’s shoulder.

The bed beneath them creaks softly under the weight of their bodies pressed together.

Lava’s breath brushes against Wave’s cheek, uneven and hot. For a moment, neither of them speaks. Wave’s pulse thrums in his ears.

Then, Lava’s gaze moves from his lips to his eyes again, searching, as if he’s making sure Wave is comfortable. Wave doesn’t look away this time and answers any unasked question with a nod.

“Wave,” Lava begins, his low voice going straight to Wave’s dick; which is almost fully hard by now. “Can I use my mouth on you?”

Use his mouth on– Oh, he wants to give Wave a blowjob.

It’s Wave’s turn to snort. “Use your mouth?” he says teasingly. And maybe spending so much time with Lava is rubbing off on him. “And here I thought your bad mouthing would follow you to bed.”

Lava chuckles, clearly pleased with the other’s playfulness. Wave feels the breathy sound vibrate against his throat as Lava mouths at it.

“I was just being considerate to your virgin ears.”

And even if Wave’s ears do feel hot, he refuses to let Lava win. “Since when are you considerate?”

“Stop evading my question,” Lava says as an answer, still teasingly but also more firm. “Do you want me to suck your dick or not?”

And Wave… is a weak adversary, apparently. He swallows and murmurs a quick, “yes, please.”

Lava laughs freely, lips against his left shoulder now. “Oh, now he’s polite again.”

Wave grabs Lava’s head and pulls him up, crashing their lips together once again. “Shut up,” he whispers, tilting his head slightly, their noses brushing.

It works. Lava smiles, small and mischievous, and kisses him back. The kiss that follows has lost all softness and teasing from before; this kiss has purpose.

Wave closes his eyes and breathes in deeply, Lava finally moving down, down, down, leaving a trail of kisses just like before, but this time not stopping at Wave’s sternum and continuing lower, until he’s face to face with Wave’s crotch. Lava kisses just below Wave’s belly button just as Wave sits up on his elbows to get a look. And what a look it is; Lava between his legs, looking up at him with sure, encouraging eyes, “You sure?”

There is no pressure in Lava’s gaze, and Wave knows that if he said he is, in fact, not sure, Lava would simply nod, and they’d go back to just kissing. Or go to sleep.

That knowledge makes Wave’s heart tighten. He nods and murmurs, “I trust you.”

Lava smiles at him, all raw and way too deep for someone who said, hours before, that he didn’t feel anything. His thumbs trace absent circles against Wave’s hips, as if memorizing every detail, before tugging down the pants and boxers at the same time. Wave helps him by laying down completely again, lifting his hips, and also moving his legs to help Lava discard the clothing to the feet of the bed.

And then there he is, completely naked in front of the boy who saved him.

“Hey,” Lava calls for him, shaking him a bit. It’s then that Wave realizes he has his eyes squeezed shut. When he opens them and looks down again, he finds Lava looking at him with something tender and appreciative. Clearly enjoying the view, he murmurs, “You look amazing.”

Lava swallows and breathes out three times before replying, fighting the urge to cover himself, because Lava would take it as a cue to stop. When he has gathered himself enough to speak, he says, “T- Thank you.” It’s half truthful, half teasing. “Can you just get on with it?”

How unromantic, he reproaches himself.

Lava doesn’t seem to notice nor mind. He takes one look at Wave, from head to toe, before doing a ‘yes, sir’ salute with his hand against his forehead. “As you wish.”

And, without any more warning, he’s leaning down and taking Wave into his mouth, no easing into it.

Later, Wave will be far too embarrassed about both the wail he makes the moment he is surrounded by the heat of Lava’s mouth, and the way his body tenses, almost trying to curl on itself. Thankfully, Lava doesn’t comment; he only braces his forearm against Wave’s stomach, keeping him in place, and freaking goes to town.

Oh god, he’s definitely experienced. Wave thinks helplessly, as he runs a hand through his own hair. This is so not fair.

Lava moves like a total expert, categorizing Wave’s reaction to every slight change of movement or pace. Wave can do nothing except hold on for dear life and enjoy the ride. Wave has definitely never this done to him, of that he’s sure now. He feels every vein in his body electrified, all his senses clouded by the overwhelming pleasure.

Lava’s free hand, that one that isn’t holding him down, decides to come play with his balls in time with Lava’s sucking, making Wave moan even more loudly.

If Lava wasn’t so good, and if he wasn’t feeling like he has reached nirvana, Wave would certainly be worried about Uncle Peng hearing him. However, Lava’s skillful tongue makes it impossible for him to worry about anything except finishing too soon.

Not more than five minutes have passed when Wave feels the tell-tale sign of his insides tightening and curses out loud, “Fuck.” He mutters, moving one of his hands to Lava’s hair to try to pull him up. Lava goes without a fight, cleaning the saliva from the corners of his mouth with the back of his hand. It should look disgusting, but it only makes Wave even more desperate.

Lava eyes him questioningly, as if mad that Wave has made him stop. He must really enjoy doing that. “I– I’m about to…”

Lava chuckles and licks him from base to tip. Wave’s whole body shivers. “Isn’t that the whole point?” Well, yeah, but Wave does not want the fun to end so soon. Sensing his hesitation, Lava adds, “Don’t worry, you’ll last longer next time.”

And with that, he goes back to work. Now even filthier and sloppier than before.

Wave feels like he’s about to die. That Lava will suck his soul out of his dick. With a last loud mewl as a warning, Wave feels his body tense and tense and tense until it hits a breaking point and releases; spasming over and over until he feels himself blackout for a few seconds.

When the world slowly comes back into focus, Wave opens his eyes to a blurred ceiling. He blinks and takes account of his body, his heartbeat uneven, his body heavy, and Lava is retracing his previous path but this time way up, kissing every skin in front of him until he’s hovering over Wave’s face, smug smirk on his face.

“You sure were a virgin,” he says, his voice low and completely hoarse, a consequence of him using his throat just now. The sound of it makes Wave’s dick twist weakly.

Instead of responding to the clearly provoking comment, Wave lets out a quiet laugh under his breath. He hadn’t realized how much tension he’d been holding until now, with every part of his brain stopping the search for answers. “No kidding.”

Lava looks at him for a couple of seconds, clearly shocked by his calm, nonchalant response, having been expecting shyness now. He raises an eyebrow and smirks sideways, one hand coming up to trace the corner of Wave’s mouth. “I haven’t heard you cursing before,” he tells him quietly. “I like it. I like this confident side of you”

Wave smiles at him, bracing himself to lose the little energy he has left. One of his hands moves down Lava’s torso toward his pants and cups the hardness underneath. He also opens his mouth and sucks Lava’s thumb into it, stroking with his tongue.

Repay time, he thinks as Lava grunts.

When Lava nods in consent, Wave moves his hand inside the clothing, grabbing him and starting stroking the way he usually would for himself.

Lava moves to press his weight on one elbow, burying his face on Wave’s shoulder as the other works on him. “This won’t take long at all,” he confesses between his teeth.

And it’s true. Less than two minutes have passed, in silence apart from Lava’s ragged breathing, when Lava murmurs an almost-there “tighter,”, which Wave listens to, followed by a louder, choked-out, “yeah, like that.” And then he’s cumming inside his own pants and Wave’s hand.

A minute later, when Lava’s aftershocks stop, he gets up and moves to the small bathroom attached to their room without a word. Wave suddenly feels cold (which should be a joke, in this weather) and way too naked.

Lava is quick to come back, now fully naked and with a wet cloth in his hand. Wave doesn’t even pretend to not be staring. He cleans Wave’s hand silently, before tossing the material in the laundry basket’s direction.

Wave expected some tension, but Lava just smiles at him, kissing his temple, and repositions them until they’re spooning, just like they were the night he gave Wave’s watch back to him, a small sheet over them as cover.

“How’re you feeling?” Lava breaks the silence after a while. Wave is almost asleep, content and leaning into Lava’s warmth.

He hums in response before adding, “I think I was closeted before.” He says this even if he’s not answering Lava’s question at all. He thinks that may be the reason why he sympathizes and understands Uncle Peng so much; he also had a reason to not be open about his queerness, probably. “I feel as if it’s the first time I have let my body… enjoy.”

Lava hums in acknowledgment and shifts even closer to him, his arm tightening around his torso. “Glad to be of service.”

Wave slaps his arm without any force behind it. “Shut up.” And, after another beat of silence, he adds, maybe because of the safeness of the darkness, or his satiated body, or the comfort of Lava’s cuddling, “Just promise tomorrow you will not pretend that this meant nothing.”

Lava takes a long moment to answer, and Wave even thinks the other has fallen asleep already. But then, after a while, he feels soft lips against the back of his neck, and a low murmur, “I promise.”

Wave smiles as he drifts into sleep.

For the first time since he woke up disoriented in that hospital room, he feels it: he is going to be okay.

Notes:

Thank you so much for reading!! I can't wait for next friday.
Kuddos and comments are appreciated!!