#dom!asmo

Lucifer ❤️

You say it teasingly because he's totally in his own "taking care of the family" mode again, while he's trying to do his work, solve your life problems, and help you with homework, all at the same time.

And his reaction?

No.

Not again.

He just sends you a withering look, completely not taking it seriously

You hang out with his brothers, after all, you were probably just messing with him

Privately, it's a bit of a different story

Still doesn't take it seriously but will sigh lovingly instead, messing with your hair

"Yes yes, big brother is going to take care of this."

Cue you blushing like an idiot

Cue him going "💡"

Laughs softly at it. But I mean, honestly, you should have been just honest with your desires.

He's gonna make sure to fulfill them completely now, after all~

Gets "gentle dom" and "service dom" in big brother mode. Really likes to pat your head and give you forehead kisses. Being a big brother means taking care of someone to him after all.

"Oh, like that?"

"Does that feel good?"

"Don't move. You don't have to worry about anything… Your big brother is taking care of you…"

Mammon 💛

You just say it randomly, to tease him.

His reaction is a mix of embarrassment and a kind of strangely pleased reaction.

Because you're family. You said so! - is his first thought

But also embarrassing because gez, it's embarrassing okay!

You will have to lay it thick that it's a kink. 

So you do - springing it on him during sex. A terrible idea, really. But you can turn it into a joke, he won't mind.

"W-What are you saying!" He stutters, he blushes, and huffs about it...

But his reaction... Is not bad. :>

He likes to be the "seduced" big bro. Really subby, "I can't give in to my desires!" type.

Naturally, it will make you bratty as hell, taking advantage.

Handcuffing him into the headboard with a giggle, climbing right into his lap, squirming your butt around, totally on purpose. With your shirt collar hanging open, and you will see his eyes flicker down, him blushing, trying to pretend like he didn't look at all.

"What's with ya, MC? Dumb prank, one Lucifer is enough, ya know? C'mon..."

But you will only grin, tilting your head teasingly.

"But don't you think I'm cute, big bro?"

He will only gulp in response.

Levi 🧡

He asked you to. It was a bad idea.

You were cosplaying a typical cutesy "little sibling", and you asked you to get in character... So you did... A little too well, shuffling your feet as if shy, looking at him with wide, innocent eyes and saying;

"Is this good, big bro?"

Oh no.

Hell no.

Levi snaps a quick photo and promptly runs the fuck away.

Because he popped the biggest boner in his life in promptly 0.3 seconds. Seriously, he almost got dizzy.

You get a "💡"

He's a damn filthy pervert so he likes all types of little sibling treatment from you - from a cold tsundere act, to a cute innocent cinnamon roll, to a teasing brat.

Which, naturally, produces a bit of different flavors from him.

He's probably the biggest, open perv with a tsundere-type lil sibling.

"Tch, stop drooling, it's disgusting." While you sit on his lap as you play video games, and can't stop sniffing your hair, and you can feel his erection pressing into your back, and he wasn't drooling but he sure as hell is now. Pressing himself closer, lifting you up a bit so e can thrust right against your ass, his body shivering.

The innocent act makes him feel like the biggest pervert though.

"Y-You shouldn't touch those places, big bro..." While he quite shamelessly gropes around your chest, his hands trailing through your stomach to massage the inside of your thighs, hips, fingers rubbing right against your front. 

"D-Don't worry... I'm just measuring you... F-For cosplay, y-you know?" He says, flushed to high heavens, not even looking away from your body.

"Oh? Wanna see?~" You ask, grasping onto the hem of your maid dress that was certainly way too short, grinning at Levi, who spent the last fifteen minutes trying to not look at your legs, your revealed thighs... The absolute territory... And now this. "Then get on your knees, big bro~ And beg like a dog~!" You honestly expected more preamble but he looks at your face and just drops. It's a bit too heavy, and he's being a good boy so you decide not to tease him... Too much. Lifting up your maid skirt, high above your waistline, fully revealing your underwear, right in front of his face. "Fufu~~ Big bro is a dirty sibcon~~"

Asmo 🩷

He asked you to. It was a great idea.

Asmo really doesn't get to be the big bro a lot... Not in the official sense, his younger brothers rather mostly rather willing to swallow glass than be his cute little siblings.

So he gets an idea while painting your nails, gently blowing at the nail polish.

"Now you look like part of the family you know. So... How about you thank your new big brother for his hard work, okay hon?~"

He had his ideas before, little to no kinks he didn't want to try but...

When he feels lust waffling from you while you answer... Oooh, this was good.

He brings it up all the time, wanting to be called big brother, or even big sister, as long as it makes you squirm and flush and makes you so so adorable, he could eat you up!

Then one day, he catches you masturbating... And decides to be the right bastard about it. Because you didn't need to, or didn't tell him, so he has a right to tease you a bit!

He gently catches your hands while you stutter, heart beating like crazy with embarrassment, or because he startled you or because you were still so so turned on.

And you don't know what you expected... But he leans into your space, slides his own hand into your underwear, and... Oh.

"Big brother is going to teach you how to do it properly, okay?" He says, expertly playing with you with his delicate dexterous fingers. "Pay attention, silly... Or do you need him to make you feel good, hm? Because it doesn't feel that good when you do it alone?" He giggles. "Big bro is going to make you cum of his fingers everytime, if you only ask... Unless you need more?~"

Satan 💚

He does not hear that a lot... It's kind of amusing.

You say that while you two play with the cats. Because you notice how gentle and protective he is of them. And it just reminds you... So you put on a pair of cat ears, and decide to goof around a bit.

"Such a purrfect cat big brother, Satan. Pet me too, big bro~!" 

He has to cover his face not to laugh, and he sighs but does reach out and runs his fingers through your hair, petting along your neck like you were truly a cute little kitty cat.

He doesn't really expect it but from that day on, he kind of enjoys having a needy cat "little sibling". Makes him more affectionate towards you, and if you had problems asking for affection before, well, this role strangely boosts your bravery.

The turn towards sexual happens accidentally, actually... He just starts cuddling up to you, touches turning more intimate when he notices... You wearing the "cat sibling" headband... He freezes for a moment, his face turning red... And makes a gamble.

"... Do you need big brother's affection here too?" He asks quietly, gently petting lower...

Beel 💙

It starts because talking with him and Belphie, observing their interaction, you decide - he's way more of a proper big brother, than most of his brothers are.

So before asking him for any little favor, you add on a little "big bro", to reference that conversation, turn the phase into your secret praise of his character.

He's... Honestly a bit confused but since he also knows the context, well, he can't say he dislikes it.

It becomes such a natural part of your relationship, it's honestly only a matter of time before it slips out in bed...

And it does.

He's giving you head, and fuck, it's Beel quality head, meaning - he has been sloppily, hungrily sucking and licking you for at least an hour now, with no signs of stopping. You don't know how many times you came already, but somehow you don't even feel too overstimulated yet. Just hot, panting, feeling almost like you were floating, completely lost in his warm, wet, mouth.

"Ah... Feels good, big bro..." You mutter, not even aware of what you're saying... And his gaze snaps to your face, half-lidded eyes, look intense...

And he shudders. Grabs onto your thighs to bring you even closer, make you cum even more-

You're almost completely out of it before he's done... But you make sure to whisper and moan your private little praise for him all through.

Belphie 💜

You kind of call him this one out of the blue. Just realizing that he's the youngest one, that it's probably a foreign concept to him... So you say, half to yourself, half to him, not even respect him to react;

"Big bro Belphie."

And he just stops. And looks.

He did not hear that one for a long time

It takes him completely off guard, but it's not entirely, not really negative... Lilith didn't call him "big bro" a lot but still...

He laughs it off, and proceeds to turn goblin mode to tease you about it.

"Big bro Belphie... Is that what you want to call me now, MC?"

Cue your embarrassed "No!"

He laughs... And proceeds to remember it forever, using it against you when you two are alone.

Seriously, you can be studying in the public library, in a group with Satan and Mammon, and the moment they start doing a ruckus, Belpie will lean in close, just to whisper in your ear;

"Need your big bro to help you with that?~" 

And just smirk smugly, like a cat that got its cream, when they turn around to find you red in the face and speechless.

He really likes you embarrassed like that.

And you just gave him new material.

Really, that was the fuel but you light the match - because he gets whiny, and complains in the mornings so you just say:

"If you want to be a big brother so much, then start acting like it." Grumpily.

Ah, so that's how you two were going to play? 

"Well, big brother missed you in his dreams, so how about you give him a little initiative to get up?"

Aaaand you blush. But do give him a kiss. And then another and another when he asks.

Hm... Interesting.

He starts really liking it when you call him that. He's not sure why but it makes him feel all... Fluffy. And protective.

Then one day you wake up to the feel of his hands creeping up under your shirt slowly, massaging your nipples with a gentle caress before drifting down, along your hips, the elastic of your pajama pants, and...

"Belphie..." You whisper, and he lets out a small noise, pressing himself flush to your body, not letting you turn around, hot breath against the nape of your neck.

"... Big bro was having really dirty dreams about you, MC." He says, his voice slightly shaky, and he expects you to get annoyed to tell him to stop... But you don't. You freeze, and get red in the face, and he can feel your legs squeezing together. It makes him huff a quiet laugh in response. "So just let him touch you a bit, okay? Not gonna do more, promise..."

He will mutter and fuck, the hotness down in your belly is so intense you already feel like panting.

So you... You play along. With high, whining voice, both embarrassed and strangely... Tiltilated.

"Y-You can't touch me like this, it's not right..."

You can feel him shiver in response, his hips sifting almost against his will, pressing his erection into your thighs...

"Shh, it's okay... Big bro is just making himself feel good. You feel good too, right? Then rhere's nothing wrong about this..."

You put on the whining protests all the way through, despite your hips eagerly pressing back into him, body arching into his touch.

And he keeps with his reassurances, promising he won't do more, just let him touch you a bit... Just give him a kiss, and he will be satisfied. No, a proper one, be a good little sibling, and open your mouth...

He will just take off your pants okay? Just the pants? So you two can touch more, it's more comfortable anyway...

All the way until he's sliding into you, and your eyes roll back, and you swear you almost cum on the spot, body shaking, and reaching back to grasp onto his body, to pull him closer, unable to say anything, letting out quiet panting sobs of pleasure.

"It's gonna be our little secret, okay sib? It's okay, it's okay, we're just feeling good together... I'm gonna pull out, there's nothing to worry about..."

He doesn't, making sure to press himself all the way inside as he fills you up, warmth spreading inside, making you tremble...