You can safely say you hadn't expected things to escalate like this when you arranged for the three of you to hang out at your place for the afternoon.
– What gives you the right to say such things about my girlfriend?
Specifically, you hadn't expected Drive Knight to go poking and prodding at Genos like this.
– I was not aware this was news to you.
Almost like he was riling him up on purpose.
– What are you implying!?
– Guys, could you please stop this shit? – You really dislike having to mediate like this but the sound of Genos's fans kicking into high gear was a telltale sign that he was ready to switch from words into violence.
– Just let me hear him, Reader.
You're not worried for Drive Knight, or for any of you really. On the other hand, this flat could do without destruction.
– Genos-kun, have you not had sex with your girlfriend yet? You would know that if you did.
If Drive Knight had been wearing the expression to match his smug words you would've just gone and dumped him into the nearest ocean.
– WHAT? You.. What the hell are you saying? We've only been together for a week!
– She didn't wait a week with me.
There's a pause. And then Genos suddenly turns to you. You'd be lying if you said the look on his face didn't scare you a bit. – Is this true?
Across the table, Drive Knight remained watching in calm amusement.
– That I was fuck-buddies with him some months ago? Yes.
– Why didn't you tell me?
As frightening (and hot) as Genos looks when he's angry, it doesn't stop you from standing your ground.
– Genos, just think about it, would you tell every single detail about your life to someone you recently got into a relationship with? Drive Knight – you gesture at the mentioned cyborg – is just a good friend to me now. It would be just plain weird to tell you that stuff.
He seems to ponder your words for a bit and, after throwing a pointed look at Drive Knight, says in a slightly calmer tone – That does make sense. But... – he cuts himself off when Drive Knight gets up and goes to sit next to you and narrows his eyes. – Senpai?
You also mean to ask what the hell is this guy going to do now (hasn't he antagonised Genos enough?) when you feel cold metallic fingers grabbing you by the back of your neck. For a split second your body is reminded of the wonderful things those expert hands can do to you and it yearns for that. But that's in the past. And he shouldn't be getting his hands on you like this. Or at all, really. You're about to give him a piece of your mind when fingers get shoved into your mouth. At the same time the hand on your neck tightens its grip. "Don't struggle" it means.
– Genos-kun, lower your incinerator. Why not use this opportunity to change the fact that you've never been intimate with her?
Oh and he's still going on about- WAIT. Did he really just imply what you think he did? You're not really opposed to it but this is certainly coming out of nowhere.
Genos meanwhile is looking at the two of you like his senpai just told a complicated joke that he didn't get and wasn't sure he should be offended by. Hot air rises from the hand still pointed almost in your direction but the incinerator is no longer at the ready. His fans had also quieted down.
You grab Drive Knight's wrist, trying to get the fingers off your mouth. Surprisingly he does pull out, leaving you coughing while he makes quick work of pulling you onto his lap, grabbing your wrists and holding them behind you.
– Wait, where are you going with this? Ze- – he sticks his fingers back in your mouth, pressing down your tongue. You bite down, mostly out of spite.
– Be quiet. – you can tell he's amused.
With anyone else you would have beaten the fuck out of them by now but you have faith in Drive Knight. He has a bad habit of making the worst impression of himself when his goal is something everyone would have agreed with anyway. This is just another such situation.
Genos, however, doesn't know any of this about his senpai. He does notice you're not struggling and mostly just looking a tad annoyed (thank fuck he's lately gotten better at reading a room) so he stays put, seemingly trying to kill his senpai with a glare.
You feel Drive Knight's free arm snake around you, pressing you back against him. Now you effectively cannot move your arms. His torso isn't fully covered in stiff armour like your boyfriend's but whatever it's made of is still uncomfortable.
Genos watches attentively, fists clenched at his sides, as his senpai spreads your legs.
– Come on now Genos-kun, don't you want this? – Drive Knight asks, starting to rub you through the fabric of your skirt. At first, you instinctively try to back away from the sudden touch, a movement which only makes your shoulders hurt. You end up accepting the touch. Looking up, you see Genos staring at the hand, expression unreadable. Is he jealous? Angry?
.
You almost start to lose some of your faith in Drive Knight. Maybe you do a little bit. But it's hard to stay worried when there's intricate metal fingers drawing patterns around your clit, teasing. He remembers very well how to play you.
.
– Are you afraid?
Genos raises his gaze. Your eyes meet and he looks away, frowning, biting his lip.
– Just let her go. – if his voice hadn't been enough to tell he wasn't sure of his words, the sound of his fans alone would have betrayed him.
There's a small pause and you know Drive Knight is pondering what to say.
– Genos. – the tone and lack of honorific made him start – I know what she's like in bed more than you do, correct?
Genos didn't answer.
– It is precisely because of that that I know she's fine with this. She wants this. Don't you, Reader? – His digits in your mouth stroke your tongue, pressing further in. It's nothing like having an actual cock in your mouth but you close your eyes and try to imagine it, how it would be like to have Genos use your mouth like this. You hum and suck on the metal fingers, spreading your legs more. – See? – As if commending you for your good behaviour, he rubs over your clit a bit harder. It's good, he's always been really good at this, and you want more. You try to buck your hips into the touch but the mechanical arms holding you are unyielding.
As much as he could make you come simply like this, you really want something inside of you.
It's with that thought in mind that you open your eyes again and throw a pleading look at Genos. Fuck, the way he's staring at you with want now must have made the rest of your blood rush downwards. And he's unmistakably recording all of this too if the flickering in his irises is anything to go by.
He crawls over to you and bats away the hand rubbing your sex. Before you have time to complain, you feel him pull off your panties, hot hands running through your legs way more than they needed for such a task. As he's doing that (and also removing your socks) you feel dexterous fingers running along your waist in search of the zipper. Its discovery is signalled by a zzzzzzzzp and the skirt quickly finds itself tossed aside.
Drive Knight wastes no time plunging two fingers in your pussy and fucking you with them in earnest, making you moan. The cold metal digits quickly warm in your insides and you're so wet and needy that you'd gladly take a third, and you strain your hips and suck at the digits in your mouth more eagerly in hopes the message gets across.
– So greedy – he says right by your ear as he gives you what you want. You now feel pleasantly full on both ends as his skilled movements bring you closer and closer to orgasm.
When you hear the sound of Genos's arm-blade being brought out you don't really react. It casts pretty, mesmerising reflections and you simply stay still as it is brought closer to your chest.
Genos slices cleanly through the fabric of your shirt and top.
You blink in surprise. The other cyborg is making sure you're too turned on to really care but you still glare at Genos. These weren't your favourite clothes but you quite liked them nonetheless!
Genos merely grips your chin and looks down on you with one of his little malicious smiles.
– If you didn't want your clothes ruined, you should have helped us out.
Right now, you really don't have it in you to remain upset at him or even pretend to. The two cyborgs seem to exchange a look and he lets you go to remove his own shirt.
At the same time, Drive Knight removes his fingers from your sex. You whine as you clench around nothing and he makes a sound like he's tsking at you, pushing the fingers in your mouth deep enough to nearly make you gag. He offers his hand to Genos who positively growls as grabs it, smelling and licking some of your wetness off of the metal hand while he fumbles with his own belt.
You're pretty sure you felt a shiver from Drive Knight as you watch your boyfriend let him go and finish removing his pants. He pushes the both of you back with a hot hand on your chest and now you're essentially lying on top of Drive Knight as he supports your combined weight with his forearm behind him. Did he just... wipe off his hand on your discarded skirt? Eh, it was going to need washing anyway. And there's better things to pay attention to now.
Like Genos, leaning over you, rubbing your thigh, as his crotch plating shifts with a sound of metal sliding over metal. The now exposed artificial dick was pretty much like what you'd fantasised about, made from a material like the mesh on Genos' neck. It seemed the frenulum was like one of those silver cables too.
You really wish you could reach out and touch it, warp your lips around the head and taste him. Or just pull him down so he'd finally fuck you.
Drive Knight's train of thought must not have been all that different because suddenly you're free to speak again as he shifts below you and you hear the sound of something opening and a cable being pulled.
– Genos, – he says, handing over some connector cable. – let me feel all of it.
Right. You recall that Drive Knight's body was made so that all his erogenous zones were hidden on the inside, protected by armour and mesh and artificial muscle. His hands were the closest thing he had to an external erogenous zone. Of course he wouldn't pass up an opportunity to feel what it is like for someone "fully equipped".
Genos takes a moment to understand what Drive Knight is asking but then he quickly grabs the thing and fumbles with a compatible port somewhere on his nape. You hear Drive Knight pull out more cable, enough that it won't get in the way.
.
After that is done and you are once again made to taste metal fingers, Genos (finally!) lines himself up with your entrance and, grabbing your thighs, fully thrusts into you. His low groan is mirrored by Drive Knight as the later grinds up into your ass.
Fuck, this is better than what you've dreaming of. You feel so full and he's so warm and it's all enough to bring you over the edge with a muffled moan.
You vaguely hear Genos hissing above you, slowly grinding into you as scorching hands grip your thighs, probably leaving bruises.
When your spasms die down and you are able to focus on him, the sight that greets you nearly brings you to orgasm again. Genos is clearly trying to remain in control of his body and having a hard time with it. You can see smoke spiralling up from his frame and even from this distance every breath of his pushes hot air towards you.
Your blood rushes to your face as you're reminded that he's recording all of this.
He starts moving proper now, with slow deep thrusts. The orgasm has left you very sensitive and you find it hard to relax enough for him. It's nearly overstimulation at this point but even if you could you wouldn't have made him stop.
Beneath you, Drive Knight humms. – So, Genos-kun, how does it feel?
He's started thrusting the fingers in your mouth at the same pace as Genos.
I… – you see adoration intermingled with lust in his expression. – ahh, it's more than I expected. Fuck, you're so tight.
He speeds up his thrusts and soon settles into a proper rhythm, snapping his hips with mechanical thrusts. You're definitely going to end up with bruises from this, and the thought of later wearing the marks of what you're doing with Genos right now is very arousing. When his hands start moving over your body, eliciting soft moans out of you, cupping your ass, gripping your hips, feeling your breasts, you wonder if you're also going to get burns because the cyborg might as well be drawing with lava on his hands.
One thing that you're noticing which never came up in your fantasies is the sound. Yes, metal on skin sounds a bit different from skin on skin, but there's also the clinking of armour, the core humming, the loud whirring of fans, his voice. He's just so loud and present, drowning your senses with a loud and heavy heat. A stark contrast to Drive Knight, meticulously silent, and whose cooling system you feel more than you hear, faint vibrations against your upper back.
– Drive... – the breathless way Genos draws out the last syllable is almost cute. – Could you actually lay down?
There's a moment during which Genos slows down and then Drive Knight must have stopped propping you both up because now you're looking at the ceiling… and then Genos leans forward and rests most of his weight on you as he resumes his rhythm from earlier.
You let out a groan. It's like being crushed by hot irons which are also buzzing. There's armour digging into you and scraping at your skin and you love all of it. This is what you've been wanting and it's pure bliss to have it all.
You wish you could move so you could embrace him but your arms are pinned and you're pretty sure Drive Knight would also try to stop you somehow if you moved your legs. Of course, he always enjoyed doing things at you more than with you. For him, you're probably here to be fucked by Genos for his own entertainment.
As if he'd been reading your thoughts, Drive Knight runs his free hand along Genos' back, feeling the armour, the ridged spine, touching him everywhere that you want to touch. Genos is almost purring at the attention, all the while making use of your proximity to cover the skin of your neck and chest with burning kisses and licks.
And then you sense Drive Knight's hand running lower and lower down Genos's body until he grabs at his ass. You nibble at the fingers still in your mouth. "Please don't do what I think you're about to do", you want to say. Is it not enough to feel everything Genos is feeling?
Apparently not because Drive Knight finds what he's looking for, making Genos straight up stop with a shiver and say in a strangled voice:
– What are you doing? Ah.. S-senpai?
You can feel him trembling. Drive Knight is surely toying with his entrance.
– Have you ever done anything with this?
Genos vigorously shakes his head in response, rocking his hips like he's unsure if he wants to get away from the touch or press back into it. Drive Knight makes an amused sound.
– You should enjoy this.
The fingers in your mouth are removed and you nearly choke on your own spit from the sudden change. It feels weird to have your mouth vacant.
Genos, above you, is trying to look over his shoulder at what Drive Knight is doing. Suddenly, he groans and arcs his back. Like this, some of his armour is pressing against your clit. Which would be great if he were to go back to moving. Being left on the edge like this is not so fun when it's the second time in a row.
.
Wait, you can just tell him that yourself now.
The moment your mouth opens there's a strong cool hand cutting off your airflow.
As he slowly lets up, enough for you to breathe but still keeping a constant pressure to stay quiet, you realise that, right, Drive Knight has a hand that isn't knuckles deep in your boyfriend.
– Genos. Move. Now. – Drive Knight's voice comes almost like a growl, his hips forcefully grinding against your ass. He too must be getting close.
Genos acknowledges him with a grunt and starts a brutal pace on you, one hand digging into your hip and steam rising off of him in waves. It doesn't take long before Drive Knight comes, shuddering beneath you and begging Genos not to stop.
Genos himself barely lasts any longer and it's the feeling of him thrusting deep, twitching and spurting inside of you, while you're nearly crushed under his searing frame, that brings you over the edge once again.
.
As the high subsides and the three of you bask in the afterglow you think that yes, you've definitely gained some bruises from this. Moving your arms is going to be interesting at the very least as well.
Clearing your throat (Drive Knight's hand is still there, stroking your neck) you say:
– Uh, we should do this again sometime.
This prompts a snort from Genos.
– Agreed – Drive Knight says.
A.N.: As much as I love the senpai-kouhai basis for DK and Genos, it sure makes things hilariously cringe when you need a "s-senpai, aah, what are you doing back there? *gasps*" moment.