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another-lost-mc · 1 year ago

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a/n: this is for a friend that celebrated a birthday this week. I hope it was a good one! 🎉

when it's mc's birthday | the demon brothers

2.6k words | nsfw | gn!reader | fluff and non-explicit smut

cw: my fav bias is showing again. mostly soft!demons. car sex; levi's tail gets its own warning; bathing together and bath tub sex; dream magic and implied dream sex.

Lucifer plans your birthday with the utmost care. He booked a reservation at your favourite restaurant so that he can treat you to an intimate dinner. He remembered the various items you've pointed out to him in the past while browsing through the Devildom's shopping district. He went back and bought every single one of them, and they're already wrapped and tucked away in the back of his closet for later.

After he walks you home from the restaurant, there's a bottle of Demonus on ice waiting in his room. You share a toast while he watches you open your gifts. You kiss his cheek, eyes shimmery and warm with so much affection, and he can't resist the urge to kiss you properly. A soft, booze-sweetened kiss leads to another kiss, and another, and another after that. He strips your clothes off slowly, like he's unwrapping a gift of his own. He memorizes the sight of your body stretched languidly against his dark sheets. He almost feels selfish for a moment because he wants you so desperately, but the lust simmering in your gaze makes his heart race. He knows how much you want him too, and he's powerless to deny you.

The first time he makes love to you, it's heat and frenzied passion, the build-up of coy anticipation that finally boiled over. He reaches for you throughout the night between quiet conversation and short naps. Each time he pulls your body close to his again, his lips whisper tender confessions against the delicate shell of your ear while he worships your body with his over and over again.

Mammon isn't very subtle. In the days leading up to your birthday, he asks random questions about things you might like or activities you're interested in. He wants to get a head start and beat his brothers to the punch. His fake nonchalance isn't convincing, but it's still endearing how much he truly cares. Who else should celebrate your birthday if not him? He's your first, and he's not going to let anyone else spoil you more than he does.

He tries to budget his money and curb his spending so he can afford whatever it is you ask for. If that fails, he takes on some less-than-prestigious part-time gigs for extra cash. You could ask him for the world and he'd find a way to scrimp and save and scavenge and steal if he has to so he can give you whatever you want. He doesn’t realize (or doesn't believe) that his company is what makes your birthday really special.

He dresses up nice and polishes his car to a high-shine to match your own stunning smile and natural radiance. It doesn’t matter what you wear because when he tells you how gorgeous you are, he’s so sincere. You outshine all the riches and jewels he used to dream about—now he dreams of you instead.

He takes you on a date that's sweet and light-hearted. He holds your hand and stares at you across the table with a dopey grin on his face when he thinks you're not looking. Once you're alone in his car, that boyish giddiness fades into something greedy and confident. You meet him halfway when he leans over to give you a kiss. When kissing isn't enough for either of you, you push the seat back so he can climb over and settle between your legs. He takes you apart in the cramped front seat of his car until your voice is hoarse and you push him away from sensitivity. The car smells musky with sweat and cum and he doesn't care that you made a bit of a mess on the seat. He palms himself on the drive home, and by the time you get to his room, he's eager to do it all over again in the comfort of his bed.

Levi isn't sure what to do for your birthday, but you offer to plan a little outing for the two of you. All he has to do is keep you company, right? He braces himself with a mantra he repeats over and over in his head: do it for them, do it for them, do it and LIKE IT because you love them. It ends up being a lot more fun than he expects: a lunch date at one of the cafes you both like followed by a movie you’ve been excited to see. You don’t make fun of his sweaty palm when you hold hands in line to buy movie tickets and overpriced snacks at the concession bar. There's a cute plushie on display where they sell collectible merch. He buys that for you too and shoves it into your arms before you can protest.

He relaxes when you take your seats and the theatre lighting dims as the movie starts. You lean against his shoulder and he's glad you can't see how pink his cheeks are. Partway through the film, he decides he likes the movie, but not as much as he enjoys your warm fingers laced with his.

He jolts suddenly when you pull your hand away and slide your fingers onto his denim-clad thigh instead. Your fingers squeeze with the tiniest bit of pressure and he nearly gasps at the unexpected wave of lust that washes over him. He glances at you in confusion—you're still focused on the screen, but he can see the little smile curling the edge of your mouth. He squirms a little and pretends not to notice your fingers drawing lazy circle-eights across his jeans, inching higher up his leg when he doesn’t stop you. And you're right, he's not going to stop you. You run a fingertip over the growing bulge hardening against the zipper of his jeans, just as you feel his tail slide onto your lap and tease the sensitive skin between your legs.

Satan decides to take a different approach when he sees how overwhelmed you are by his brothers' plans for your birthday. Sometimes simple is best and what could be more relaxing or romantic than your favourite home-cooked meal? He fusses in the kitchen until everything is cooked exactly to your liking, and the dish he serves you looks as good as it smells. His room is tidied enough so that a small table fits—he doesn’t want the others bothering you if he serves you in the dining room. There are dozens of candles that cast you both in an ethereal glow while you eat together. His room might not offer the rich ambience of Ristorante Six or the electric atmosphere of The Fall, but nothing outshines the romance he creates here, just for you.

Once dinner is finished and he tidies up the mess, he pulls you to your feet and wraps his arms around you in a slow dance. It's more like swaying back and forth together as a classical record plays quietly in the background. Candlelight flickers playfully along the walls of his room, and your face is painted by a mirage of shadow and flame. He eagerly traces those shapes on your skin with his tongue after he lays you on his bed, and by the time you're shaking and falling apart in his arms, you'll know how much he loves you.

Your birthday is another chance for Asmo to spoil you. Throughout the afternoon, he leads you to each of his favourite boutiques in the Devildom's shopping district. He holds up dozens of clothes against your body and admires how the colours bring out your eyes or compliment your complexion or how luxurious the fabrics are. He pretends that he didn't pick all these out to show you (and buy them for you) in advance.

When he finally takes you to Majolish, his greatest gift is revealing that he personally designed this outfit specially for you. It fits flawlessly and even you think you look amazing. It’s obvious that he poured his love and passion into creating this for you when no one else ever has before. It’s almost overwhelming, the way his smile radiates warmth when he looks at you. His eyes burn with all the ravenous love he feels for you. He loses control of himself and kisses you, pressing you against the changing room wall and sliding his thigh between yours. He doesn't want to stop, but he doesn’t have the time or space to touch you properly here. When he pulls his leg out from between yours, he misses the searing heat of your body against his. Perhaps it’s for the best that he take you home first—he would hate to get stains on your new outfit so soon.

(He originally planned on taking you to The Fall but he changed his mind. He’s not in the mood to share you with anyone else tonight.)

When he takes you home, he leads you straight to his private bathroom and urges you to get undressed while he gets everything ready. He draws a warm bath and the steamy air clings to you both like a second skin. You feel self-conscious about being naked even though he stands before you, waist-deep in the bathwater and just as naked as you are. He takes your hand and pulls you gently into the water with him. He supports your weight when you lean against his chest and his hands start to wander over your body. His fingers leave a soapy trail up and down your spine. He cradles your neck and leans forward, capturing your lips in another kiss because he can't possibly wait anymore.

The kiss reignites both your desperate desires to touch and be touched. He walks you back towards the edge of the tub. When your back touches the cool marble stone, he reaches behind your thighs and lifts you onto the edge; he swallows your half-hearted protest with his lips moving greedily against yours. His mouth moves away from yours, ghosting along the curve of your jaw and down your neck while his fingers gently pry your legs apart. He bends his head low once you’re spread open for him, hot and trembling and all his. His eyes glow bright when you tangle your fingers in his hair, and it’s the last thing you see before he dips his head between your legs.

It's not surprising that Beel plans to take you out for dinner on your birthday. It's a tricky proposition because it's easy for him to lose control of his hunger when he goes out to eat. He doesn't want his sin to ruin your birthday dinner, so he eats a meal's worth of food beforehand. Having a partially-full stomach means he's not going to be completely distracted by hunger—he wants to focus on you.

He likes taking you to nice restaurants and your birthday is no exception. You put on a new outfit he’s never seen you wear before, but it looks so good on you that he's drooling from the corner of his mouth before you even leave the house. The restaurant is cozy and everything on the menu sounds delicious. Your nose bunches up adorably when you can't decide what to order, and Beel suggests ordering one of everything. He laughs deep in his belly when you glance at him skeptically over the brim of your menu. His eyes are bright with mischief even though you know he's dead-serious. He simply grins at you from across the table and reminds you that he won't let the food wouldn’t go to waste.

It doesn't take long for your food to arrive. Beel enjoys watching you eat while you make little sounds of contentment between bites. He offers you food from his own plate to try. When your plate is empty, he worries you might still be hungry; he's only satisfied when you promise that you're close to bursting and completely full. He leads you out of the restaurant by the hand, and his other hand carries a bag full of leftovers to share with you tomorrow.

When he walks you home, he doesn't want to seem needy or presumptuous even though he's reluctant to end the night so soon. He pauses outside your door and kisses you softly, whispering happy birthday against your lips that still taste sweet from your dessert earlier. He can’t resist swiping his tongue across the seam of your mouth for one more taste, and the kiss deepens when you part your lips for him. You only break the kiss just long enough to open your door and pull him inside your room before slamming the door shut again. Your hands tug impatiently at his waist, and he shivers at the metallic clink of his belt buckle coming undone. He can sense hunger rising inside you again, and when he pushes you gently onto the mattress and covers your body with his own, he realizes your appetite is as insatiable as his own.

Belphie doesn't mind if the others want to take the initiative and plan your birthday party. He prefers it that way, actually. When his brothers ask for his input, he recommends something casual at the house, nothing too fancy. He wants you to be happy and relaxed and spoiled where you can be comfortable.

He sneaks into town to buy you a gift before the party, of course—something you mentioned to him in passing once that was too expensive for you to justify buying at the time. He and Beel wrap the presents they bought you in their room. Belphie's present looks insignificant compared to the large pile of gifts stacked near your birthday cake. He's not worried, especially when your eyes light up when you open it. You're just as appreciative of his small gift as you are of the others you receive. He knows you so well.

(You keep the contents of his card to yourself: a reminder that he has something special to give you later.)

Sometimes when he takes you to the attic for bed, he falls back against the mattress and waits impatiently for you to crawl on top of him. There's no hint of his lazy smugness tonight though. His hands are gentle but efficient when he strips your clothes away first before taking off his own. He follows you down onto the bed and smothers your body with his. The soft mattress cushions you when he grinds against you, and it squeaks from the force of his thrusts when he rocks inside you too. Your skin is littered with the little marks he sucks and nibbles into your skin. He cleans you with a warm, damp cloth after because your thighs and belly are covered in a sticky mess of you and him. He takes care of you with so much tenderness. You’re already snoring lightly by the time he's finished, and he cuddles against you with a yawn.

Shortly after you fall asleep, you dream of him. It’s a shared illusion between you conjured with the sleepy brand of magic he commands. You writhe against him in your sleep as the embers of lust continue to burn deep inside you. When the dream ends, you both wake up and instinctively reach for each other as the remnants of the dream fades away. He kisses you breathless despite your stale morning breath. You whimper against his mouth and he rolls over until you're underneath him again. After indulging in a night of dreamy, lustful sins, you're both still desperately eager for more.