Prompt: Size Difference

Pairing: Il Capitano x Childe

Rating: E

Length: 2614 words

This was a bit of a struggle to write as we don't know a lot about Il Capitano right now, but I tried. Also, I am a fluff writer and have never really written spicy scenes before so please let me know how I did. Someone pray for Childe in this because it ain't going to be me. Enjoy!

Childe was not small by any means, and normally anyone who saw him would agree with that statement. However, Childe happened to be standing next to someone that suddenly made everyone change their minds. The towering, dark form standing behind him was enough to draw any nearby eyes to the two of them. While it wasn't exactly uncommon for people to see the Eleventh Harbinger walking through the markets of Snezhnaya, it was certainly a surprise to see the famed Il Capitano with him.

The two of them didn't seem to mind the stares though, as they continued with their business. At one point, Childe picked up a knife that caught his attention. It fit perfectly in his hand and was just shorter than the length of his forearm. He had been impressed with the craftsmanship of the knife and passed it to Il Capitano for him to inspect as well. The normal sized knife seemed to turn tiny in his hands as he inspected it. It barely reached the halfway point of his forearm as he twirled it around in his hand. Honestly it didn't look impressive at all when he held it. One could even mistake it for a butter knife in his hands.

"I could have something better made for you." Capitano scoffed as he passed it back. It was impressive quality for a random street vendor, but it wouldn't hold up with the demand that a Fatui Harbinger placed on it. "Let us return."

Childe rolled his eyes at him, but agreed nonetheless. The bitter cold was starting to get to him, and he wanted to spend the rest of his day off at home where he didn't need to keep up an appearance. He returned the knife to its place and had to hold in a laugh as others tried to get a look at the knife that had gained the respect of a Harbinger.

Childe sucked in a breath as he felt a large hand snack around his waist as someone walked by him a little closer than was necessary. The two of them knew that being this deep in the city they should be safe, but it couldn't be denied that they were still two very high-ranking officials that could very easily be the target of an assassination. Childe patted his hand in reassurance after the suspected threat had passed, but Capitano refused to remove his hand from Childe's waist. Instead, he used it to gently guide Childe backwards and towards the path that would lead them back towards the Fatui Harbinger headquarters.

Childe didn't even think of fighting the hand as it guided him. It always made Childe drool how Il Capitano was so large and could easily rip a human apart with his bare hands, but he could be so incredibly gently with him. Of course, he could also choose to not be gentle, and Childe was okay with that as well.

The many guards at the front entrance didn't even bat an eye as the two of them passed by them without a word. Capitano continued guiding him through the winding hallways with a clear destination. Childe went along without a single complaint as they passed his room on their path. Once they entered Capitano's room, he finally released Childe's waist as he shrugged off his heavy outer coat.

"Oh, is someone eager?" Childe teased. He had intended to say more but was cut off by the other.

"And if I am?" He said. "You have been deployed for longer periods recently, and I am not known for my patience, now am I little one?"

Words seemed to catch in Childe's throat as all he could manage was a small shake of his head. Capitano took a step closer to him, forcing Childe to crane his neck up to continue looking him in the eye. Well, at least where he assumed his eyes were as he was still wearing his mask. Childe pouted at him slightly as he eyed the offending thing, it was bad enough that Capitano wore the damn thing all of the time, he didn't need to wear it when they we alone.

Childe gasped when a long, inhuman tongue stretched out to meet his fingers and wrap around them. It wasn't very often that Capitano decided to be a tease, but archons knew that every time he was Childe would feel like he was dying.

"Quit teasing me!" Childe huffed as he tried not to think about the other things that tongue could do… or the things that it has done before… or what it appeared to be promising to do. A shiver racked through Childe as Capitano spread his fingers out underneath Childe's Fatui coat and splayed them across the still hidden skin.

"I'll consider it. It all depends on if you can behave for me, little one." Childe gave him a look as if saying he would think about it. Capitano didn't let it deter him and unclasped the heavy outer coat and threw it aside. Childe's eyes fell heavily onto the tongue that was still moving around his fingers as his eyes grew darker with lust.

Capitano decided to indulge him, and leaned down enough to capture his lips, his hands slid down to grasp a firm hold onto Childe's grey jacket. He left them there for a moment, just long enough for Childe to lower his guard before he forcibly pulled them apart. The few buttons that were actually done up went scattering across the floor as Childe gasped again. He seemed like he was going to say something before Capitano pulled him even closer by the strap around his chest and slid his tongue into Childe's open mouth.

Childe's back arched as his mouth opened wider as he tried to accommodate his tongue. Capitano seemed to take pity on his jaw and forced himself to not shove his tongue down Childe's throat. He didn't want him in too much pain, at least not yet anyways. Instead, he focused on fully pulling Childe's jacket off his body, he knew he was going to get an earful about the state it was in later, but it was entirely worth the reaction. Besides, it was Fatui issued so it's not like it would be hard to replace.

Once it was off, Capitano used one hand to run along the ginger's chest, but he used the other hand to slip back up to Childe's neck. It was so beautifully exposed since he had to crane his head up so much to help make up for the height difference, Capitano couldn't resist wrapping his hand around the milky white skin. He hummed as he could practically feel the tips of his fingers touch behind his head. Childe's whole body started to shake, and his knees gave out, but he couldn't fall due to the secure hold on his neck.

Capitano held him in the position until Childe started squirming in his hold. His lungs burned from the lack of air and the pressure on his neck was enough to make his brain go fuzzy. He let him struggle a few times before pulling his tongue away from Childe and loosened the grip on his neck. The other man sucked in several breaths rapidly, but Capitano didn't miss the pink blush that spread from his cheeks down to his shoulders and chest.

"What's wrong little one, you seem to have lost your breath." Capitano smirked. Childe looked like he would have rolled his eyes if he had the brain power to spare for it. Chuckling, Capitano took a step forward which forced Childe backwards. He continued to walk until Childe felt the bed at the back of his knees. He reached out and pushed Childe back until his back collapsed against the soft sheets. Capitano put his right knee on the edge of the bed and used his thigh to spread Childe's legs, grinning out how far they split apart just to accommodate him.

"My, now isn't that a pretty picture?" His voice darkened as he spoke. He rolled his knee forward even more to firmly press against Childe's crotch.

"I thought you weren't going to tease me." Childe's breath hitched as Capitano slowly moved his knee up and down. It was an intoxicating feeling as Childe forced his back not to arch as pleasure started to light his skin on fire.

"I remember there being a condition to that." Childe smirked as he wrapped his legs around that strong thigh and reached up to grab Capitano's shirt. He pulled him down to lean over him as he spoke.

"Then, would you please me, Master?" Childe purred into his ear. If Capitano wanted to be a tease, then far be it from Childe to be outdone. His smile didn't leave his face even as Capitano brought his hand back up and settled it on Childe's throat once again. The ginger relaxed into the pressure he felt on the sides of his throat as Capitano brought his other hand up to his own face.

Childe never got sick of the sight of Capitano removing his mask. His breath huffed out as, as his short, dark hair feel down just enough to tickle his ears. Eyes darker than a night's sky without a moon grabbed his attention as he held his graze. Capitano tossed the mask aside and dipped his head to let his sharp teeth graze against Childe's throat.

"That's a good start." Capitano praised him. "Now let's see how long you can remain coherent."

Childe didn't even have a chance to come up with a witty retort before Capitano bit into the soft skin of his throat and rolled his knee with more force. Childe flinched as he didn't know if he should shy away from the pain at his throat or lean further into it as it morphed into pleasure. He quickly realized he didn't have much of a choice as the hand around his throat held him firmly in place.

Capitano thumbed at the waistband of Childe's pants with his free hand. "There's a good boy." He stated approvingly as Childe obediently lifted his hips off the bed and unwrapped his legs from his thigh to allow Capitano to pull his pants down.

Capitano splayed his hand across Childe's stomach to prevent him from moving his hips and he marveled at how his hand could practically cover the entire surface of the others stomach. His mind drifted to how pretty his little one would once his hand was replaced by a bulge caused by something else. He quickly discovered that as much as he loved to see Childe squirm, he was losing his patience. He said earlier he wasn't known for his patience, so why bother starting now?

Capitano removed his hand from Childe's throat and ignored the little whine of protest as he gathered both of his hands into one of his own. He stretched Childe's arm high enough over his head to the point that it forced his back to arch to accommodate the stretch. He was suddenly very grateful they kept lube stashed in random places as he reached under the mattress to stealthily grab the small bottle. Childe's breath hitched in shock as he felt the cold liquid start to circle his rim.

"Behave." Capitano growled when Childe tried to move his hips enough to take in his fingers. Capitano shifted enough to force Childe to spread his legs around him enough, effectively cutting off the rest of his already limited mobility. Capitano slowly pushed one of his fingers into Childe as the other attempted to squirm in his hold. He knew he was being more gentle than he needed to be with the other man, but Capitano really preferred that Childe screamed when his dick was inside him instead of his fingers.

He took his time as slowly added more fingers and maintained his steady pace. Childe had mostly given up in his attempts to make him give him more, harder, anything other than the almost languid movements that carefully avoided any area that Childe wanted them most. Capitano could be patient when it came to his little one, as he intentionally waited until Childe's body got used to four of his fingers at the constant pace. He waited just long enough to see his body start to relax before he pulled his hand away.

He latched his mouth onto Childe's chest to keep him distracted as he as spread lube onto his cock. The physical size of Capitano body was large, especially when compared to Childe's, but it wasn't just their bodies that paled in comparison to each other. Capitano lined up and slowly eased his hips forward. If Childe's back wasn't already arched as far as it could go, it definitely would be now. As it was, his eyes rolled back into his head as shivers racked his body.

"Go on, baby, don't hold back." Capitano coached as Childe clenched around him. It only took his voice to push Childe over the edge as he cummed for the first time that night. Capitano showed a massive amount of self-control as he waited for Childe's breathing to stabilize. "I do believe it's my turn now, little one, it's only fair."

Childe gave a noncommittal hum as Capitano pushed all the rest of the way inside of him. His breaths had already returned to coming in sharp pants before Capitano started moving his hips in a quick rhythm.

"Look at how beautifully your body takes me." The captain praised as he ran his free hand across Childe's stomach. He whined as Capitano pressed against the bulge in his stomach.

Childe was already too far gone to answer that. He didn't stand a chance as Capitano changed the angle of his thrusts and picked up his speed. Childe's head spun as every thrust made him see stars, he distantly heard someone moaning loudly before realizing it was his own voice being forced out of him. He tried to speak, but it just came out as random babbling as his whines went up another octave.

Capitano huffed with the effort of keeping his pace and holding Childe's arms at the same time. He let his long tongue slither out of his mouth as he watched the breathtaking sight before him. Childe's body was torn between begging for more and begging him to stop as he was overwelled by the pleasure that attacked his body. Wanting his own release and growing impatience, Capitano wrapped his right hand around Childe's throat once again and let his tongue invade his mouth. This time he didn't hold back as he forced his tongue down his throat and smiled as he felt Childe's throat flutter in an attempt to not gag. He whines turned urgent and with just a bit more pressure on the sides of his throat, Childe screamed into his month as he clamped down on Capitano's cock. The intense pressure was enough to make Capitano's hips stutter in their rhythm, and it only took a few more thrusts before Capitano also released inside of Childe.

Capitano finally released the hold he had on Childe's arms and watched as his body slumped into the bed. He rolled Childe's head to look at him, but Childe glazed over eyes couldn't hold his gaze as he still panted softly. Capitano chuckled as he pulled out and gathered Childe into his arms to take him into the bathroom to clean him up. Barley feeling the others' weight as he carried him, Capitano smiled, Childe really was a little thing now, wasn't he?

I really said that this was only going to be about 1000 words as if I didn't expect this to happen.

If you have a second, please leave a comment or a like as they help to keep me motivated and improve my writing. See y'all next time! ~Kiera540