Work Text:
As a Knight of Favonius, you were always out doing quests and protecting Mondstadt. Today, while you were out, you had just finished killing a hilichurl family at their base. Of course, being the hilichurl defeater you are, you showed your victory by lounging in their temple for a bit. That is, until you were interrupted. "Oh? What are you doing here, y/n? You're supposed to be clearing camps right now."
"Shit- I uh, yeah, I am still! I was just... Relaxing a bit. 'Tires my bones out, y'know?"
"I didn't know you were such a... slacker." Kaeya insulted. You knew it was only half-way, since you two were friends and coworkers.
"Let's go. You can't sit on your ass all day. More might come, you know~"
For the rest of the day, Kaeya led you to both his and your locations to destroy towers and kill the hilichurls in their camps. Afterwards, Kaeya took you back to his office at headquarters to evaluate your work for Master Jean. "Let's see... Was a bitch, laid around for half an hour, required help defeating a mere mitachurl, has an electro vision- ew, and yeah. Signed by Kaeya Alberich, Cavalry Captain of the Knights of Favonius." He chuckled, writing it on a random loose leaf instead of the original evaluation paper.
"Excuse me you man whore, I'm the one who carried! You cried because you got flung by a fuckin' thing!" You snatched the paper, ripping it up and throwing it in his face.
"So what if I'm a man whore? At least I don't spend my days lazing around."
"Lazing around? I'll show you lazing around!" You removed your jacket/blazer, throwing it in his face. Then, you unbuttoned the first two buttons on your dress shirt and let it hang off your shoulders.
"Ohh.. I'm so lazy and tired today~ I had to go out and fight a tiny hydro slime.. I'm just so pooped. Please let me nap a bit, I just need some rest..!" You cried out dramatically. You were about to say some bitchy shit to Kaeya, when you noticed his eyes hooked on something. You followed the direction they were staring in, and noticed that he was staring straight at your chest.
"..Hello? My face is up here. It's a better quality of mine than my boobs. You said, waving your hand from your chest to your face.
"I think they're your best quality, actually..." Kaeya trailed off, stepping closer until you backed up into the wall.
"Kaeya, bro-" He cut you off, putting his hand under your chin and planted a kiss on your lips. You felt his tongue slip into your mouth, his exploring your mouth and swirling around your own. "Mm-" You put your arms around his neck, leaning into the horny kiss he gave you. When you two pulled apart, you could feel his eyes stare into yours the way yours were locked on his.
"Please, you look so hot y/n-"
"Y- Yeah, get on with it."
He undid your pants, helping you in kicking them off your legs. When they were finally removed, You moaned sharply as his fingers made contact with your parts. Kaeya proceeded to glide them across your slit, then rubbing you to get a reaction. Just as you started leaning into his hand, he pulled it away. He stuck his fingers in your mouth to clean them off before removing the gloves and throwing them somewhere behind him.
You watched him as his hands went back to your pussy, his one finger circling your entrance before he pushed it in. The other one followed shortly after. You basically sat on his fingers, your back pressed against the wall and your feet barely touching the ground. You could already feel yourself reaching an orgasm, the fact that this was your best friend instead of a lover and the fact that Jean could very well be nearby turning you on even more.
Just as the heat started to pool, you felt Kaeya slowly pull his fingers out and lick whatever juices you had leaked on him. He took you back to his desk, sitting you in his chair while he turned around and removed his clothes. While you had the opportunity, you moved your hand down to touch yourself while he wasn't looking. You made sure to stay quiet while you fingered yourself, the only way he would know now is by the noises your genitals made. You basically grinded into your fingers until you came, leaving some evidence on the seat. He also would be able to tell by the way your face was red and your eyes were low.
You could see him turn around, not bothering to change your position with your legs spread. He looked you up and down before busting out laughing for some time. When that moment was over, he came up to you and switched so he was sitting and you were on his lap. Kaeya just smiled at you, waiting for whenever you were ready to ride him. You grabbed his dick, stroking it a couple times before making sure it was in the right spot and sitting down on it. Your eyes widened when you felt his length inside of you as you let out a fairly loud moan from the feeling of just dropping down on him.
"y/n-" Kaeya didn't get a chance to say anything when you cut him off by starting to bounce on him. He put his hands on your hips, giving support as you rode him and his dong.
You could feel him hitting every angle of your body, but it wasn't the spot you wanted him to get. Once you leaned back, you could feel him getting it as you moaned his name like crazy. Kaeya didn't make much noise aside from the occasional grunt, but you could tell he was getting close by the way he was thrusting into you and bouncing his legs. You didn't even care at this point about what Jean could hear; she was probably fucking Miss Lisa anyway. As you both began to reach your ends, you started to moan out his name before anything else. You could feel him slam himself into you the best he could as you yelped, both of you just now cumming.
You rode him as fast as you could to ride out the orgasm you were having, Kaeya petting your head while he watched you. When you both were calmed, he pulled out of you and let you sit in the chair while he cleaned you, him, and the rest of his office up. When he cleared the office from the sexual mess you two made, he made sure you were all good before fixing himself up and getting himself dressed. At one point, you thought you were dreaming because you still heard moaning in the distance.
"K- Kaeya... Is that Master Jean..?"