Childe learns that Zhongli has a dragon tongue.

CW: Smut

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Childe only means to tease him.

It's a rare opportunity. Childe doesn't typically like to wear the Foul Legacy around Zhongli because he'll worry, shooting him a warning glance with his brow furrowed. "Don't overdo it," he always says, tsking softly as Childe tries to show off.

Childe slips out his thick tongue, flicking it seductively. "Say, Zhongli, do you want to... you know?" His tongue curls about suggestively.

Zhongli's brow raises, surprised. Typical expression from him. Childe doesn't expect him to reciprocate. Zhongli presses his fingers into a crude circle, slipping out his own tongue to settle in the middle. It is not the tongue that Childe recognizes and is well acquainted with; this one is long and thin, forked at the tip.

Childe is absolutely shameful in how he chokes, the Foul Legacy falling away like he's shed a second skin. "Wait," he says, crossing the space. Zhongli's tongue is gone, pulled back into his mouth as though it was never there. "Wait, what was that?"

Zhongli's mouth curls into a secretive grin as he crosses his arms across his chest. "Hm?"

"You know what I'm talking about." Childe tugs at his mouth, trying to pry it open, but it's like trying to move an unyielding stone. "Zhongli, open up."

Zhongli does, wrapping his lips around Childe's thumb. He sucks on it, tongue swirling around the knuckle. Pleasure rises in Childe's gut and it takes everything to dampen it. Not the right moment for this, not the right—

He pulls his thumb out, left with his cheeks flushed red, and his heart pounding.

"I have no idea what you're talking about," says Zhongli, his voice dark and smooth. Dangerous, even. Particularly with the way that he watches Childe back through a narrowly-slit gaze and smug grin.

Oh, thinks Childe. Fuck.

#

When Zhongli teases, it's quiet and underhanded. Like the subtle slip of a draconic tongue that Childe knew nothing about.

And really, he should've. It makes sense. Zhongli isn't remotely human, former Archon or not—even now, he's still an adeptus, a god, a dragon. The lizard tongue should have been a given.

He knows how to use it. Childe lays in their bed, melting into the sheets, back arching as he fucks into Zhongli's mouth. His fingers yank at Zhongli's hair, pulling it tightly until his scalp must burn. Zhongli grunts softly but doesn't stop, taking his cock right into his throat, nose buried against the coarse hair of Childe's groin. He hums around Childe's dick, his tongue sliding across the underside across the entire length, undulating against his heated skin.

"Oh, gods," says Childe, his voice pinched. "Oh, that's—that's—" His words cut off in a moan when Zhongli pulls off, curling his tongue around his length from the root to the tip. It's a strange sensation. His tongue is wet and rough, thick with an odd, inhuman texture.

Zhongli laps at him dutifully, tucking his hair behind an ear. His face is flushed red, an absolute vision with the way that his mouth is stretched wide around Childe's cock. Zhongli takes him between his lips again, slurping at his length, jerking the rest with his fingers.

No gloves this time, only blackened knuckles, the color of a deep night sprinkled with bits of golden Geo. Childe didn't know this was something that would get him off so readily, but he's all for it. Ten-ten would do this again, losing himself to the tight heat of Zhongli's mouth, and that ridiculous, devilish tongue.

"Fuck, Zhongli, I'm going to—"

Zhongli removes his mouth again, staying the orgasm that Childe was teetering on the edge of. Childe's hips buck and he whines, chasing the wet warmth that he's been so suddenly denied.

"Patience," says Zhongli, nuzzling the sweaty skin where his dick meets his hips. He nips there, sharp fangs just barely digging in, sucking a bruising mark that'll stay for days.

"Cruel," says Childe. "That's cruel, so, so fucking cruel. I was so close, I was right there."

Zhongli hums softly, nosing over his pubic bone. "Yes, I know. Too quickly. I rarely get to indulge in this way and I want to take my time."

"Speaking of—oh, hmm, yes, that's—" Childe moans when Zhongli's tongue slips lower, lapping at his balls. "Your tongue... when did you... why were you hiding it? Why'd you—"

"You don't know all of my secrets, Ajax," purrs Zhongli against him. He presses Childe's cock back for better access, licking up the seam of his balls sloppily. Then, he sucks at each one, rolling them across his tongue.

Childe is going to die. He's melting into the bed, and he's going to ascend to Celestia, he's pretty sure. Zhongli's mouth is hot around him, stoking the fire that heats his gut. Childe squirms as he jerks his cock too. Every touch is like lightning to his dick. It twitches, leaking everywhere, all over his belly and Zhongli's palm.

There's the telltale churning in his gut, the tightening of his muscles as his thighs go taut, and—

Zhongli pulls off again, pressing a soft kiss to his swollen balls.

"Oh, fuck you," hisses Childe.

Zhongli laughs then, his breath warm against the back of his thigh. He knows Childe too well and recognizes all his tells. He knows just when he's about to come and it's fucking cruel. Zhongli squeezes the base of his cock tightly, easing him away from that precipice for a second time.

"All for the better," he says, licking over the length of him, teasing. "When I finally let you come, just think how good it will be."

"Zhongli—"

"Can you do it, I wonder? Hold off for me? Be a good boy?"

Childe swallows thickly as those words settle deep in his gut. "Yes," he says, against his better judgment. He knows he's made a mistake when Zhongli lifts his hips slightly, hands curling around Childe's ass, tugging him forward. His thumbs between his asscheeks, spreading them for a better view.

And then—that tongue, licking across his tightly furled entrance, rough as it drags over it.

"Archons," mutters Childe, arching against him. He feels the way that his hole clenches in anticipation. Zhongli presses the tip of his tongue against him, slipping past that first ring of muscles. And then deeper. So, so much deeper than Childe expects to feel a tongue.

Rivals Zhongli's cock with the way that it pushes against his prostate, curling against the swollen bundle. The rough texture of Zhongli's serpentine tongue pulls at his rim with delicious friction.

"Fuck, fuck—" Childe keens as Zhongli eats him out, pulling that tongue out and fucking right back in. He squirms against Zhongli as he fucks back against his face, trying to take his tongue deeper. It's delightfully thick as it drags along Childe's insides. And while it doesn't have the same heft that Zhongli's cock does, Childe swears that he can feel it in his throat. His spine tingles as it wriggles about inside him, curling as Zhongli licks across his prostate with fevered intent.

Childe yanks at his hair again, tugging harshly. Zhongli moans against him, gripping his ass tightly, fingers digging into the muscle. Fingerprints, handprints, sharp little claw marks as Zhongli looses more of his draconic self with every flick of his tongue.

The sounds are sickening almost, the soft schlick schlick of Zhongli's face against him. Childe can almost imagine how his face looks, wet with saliva and drool. He feels the way that it drips down the backs of his thighs, pooling onto the sheets. Zhongli fucks Childe with his tongue like he's fucking him with his cock, parting his hole with every deep press.

Childe's orgasm sneaks up on him. He comes with a cry of Zhongli's name, his toes curling as he sinks into the mattress. He moans, painting his belly white with his come, his ass tightening around Zhongli's tongue, not wanting to let it go.

Zhongli moans too with a soft huff. He pulls away, wiping at his mouth. "I don't recall giving you the go-ahead to come," he says, regarding Childe through heady, golden eyes. His pupils are slit narrow like a lizard's.

He is teasing him, so Childe teases back, pushing his luck. "Can't you just take the win? I came from only your tongue." Childe bites at his lip, his gaze down to where Zhongli's cock tents his trousers. Larger than usual there, too. Childe wonders just what he's been suppressing this entire time. "We can try again, though. Wanna see how long it takes for me to come from whatever it is you're hiding down there?"

Zhongli's mouth curves into a feral, dangerous-looking smile then. He smooths his hands across the length of Childe as he presses between his legs. "Do you know what you're asking for?" he asks, dragging his fingers down his sternum before tweaking a nipple.

Childe bares his neck. "No," he says. "Show me."

Zhongli doesn't need to be told twice.