You just didn’t expect it to be…demonic.

It was quite a shock to learn that the tales you heard as a child of demons wandering around wearing human faces to eat people's souls were true, and downright unbelievable to learn that your close friend, one member of the biggest K-pop group on the planet, was trained to hunt and kill them for a living. You always wondered where the girls got their insanely quick reflexes and immense strength, always chalking it up to rigorous training.

When you watched that performance after a week of distance and missed calls from Rumi, you knew that traversing whatever was budding between you would be awkward, uncomfortable, and rough. But it would be worth it, you thought, as long as you got to continue to be by her side.

It was an incredible adjustment for everyone to get used to Rumi's demon side. It was odd how her patterns changed so much but so little about her appearance, until eventually you forgot they were there. You knew they were initially her biggest insecurity, slowly warming up to the idea of wearing more and more clothing that exposed her patterns. You remembered lying down with her at night, both of you wearing matching cozy sets as she silently told you about how she felt so weak for still being unable to show her patterns comfortably.

But through every shared reveal of her sadness, every little tugging down of her shirts and move to reach for her trusty contour, you were there by her side, that she was beautiful, before the patterns and now. Especially now, you told her, whispering in her ear about how gorgeous she looked with the iridescent mark covering her skin until they lit up with her embarrassment and shyness.

The marks were only the beginning. Now that Rumi was fully acknowledging her demon half, it seemed like the more common characteristics of regular demons started to appear more frequently.

Rumi always had an appetite; a healthy routine of performing, practicing, and killing demons would do that for anyone. But recently she was like a bottomless pit, able to eat a three-course meal without breaking a sweat or gaining a pound. Well, she did gain some weight, but instead of fat, it was mostly turning into muscle, something that came as a pleasant surprise once you explored it in the bedroom.

Then came the purring, a deep hum that emanated from her chest whenever you or the girls were around, only growing in volume when you indulged in physical contact. After that came an extreme case of possessiveness, some peculiar nesting behaviors, all culminating in the big finale.

Like, actually big.

Rumi had been avoiding you for the past few days, keeping to her solitude in her room and refusing anyone who tried to enter. Eventually, after dozens of missed calls and messages, you stormed into the penthouse yourself, startled when greeted with the abnormal silence of the grand apartment, separate from the telltale sounds of your lovers purring from down the hall.

Whipping out your phone, you tried to text your girlfriend's group members to try and understand what situation you were walking into.

Y/N : Are you both hiding in your rooms or something?

Mira : No

Zoey : Yes

Mira : 😐

Zoey : What do you want me to lie ?!?!

Mira : She's been acting weird for days and growls at us when we get too close.

You pause, hearing a throaty moan from down the hall once you pass the threshold of the entry of the apartment.

Mira : Do you have an extra pair of headphones

Zoey : I am NOT leaving this room

Mira : I'll run

Y/N : Can you guys focus??? What exactly is wrong with her?

Mira : It definitely has to do with you. She keeps calling your name every other hour

Zoey : We should use Derpy to telephoto somewhere else. I've read enough fanfiction to know where this is going.

Mira : Good idea.

Mira : What was that last part

Eventually, the messages die off, and a brief shout of the girls’ names is only met with silence. It's just you and Rumi in here. Rumi who is currently suffering from some intense demon mood swings. A mood swing that is leaving her purring and calling out your name into the night.

Perfect.

Before you can try to stop and quickly come up with a game plan, you faintly hear the sound of a door creaking open, perking up to try and hear better when you can't hear the sounds of her footsteps leaving the room.

Figuring she was still on the fence about whatever it was she was hiding, you take the open door as a silent invitation and quietly but surely make your way towards her room.

When you step into her room, it's dark, only the vibrant lights of Seoul's cityscape illuminating the wide space. You can see Rumi sitting on the opposite side of the bed, shoulders hunched as she breathes in and out in a way that only worries you.

“Rumi? My love, are you alright?” Your voice is as steady as can be, feet slowly carrying you across the floor until you rest yourself on the covers of her bed.

Your eyes widen when she lets out a groan, bordering on a growl, and the patterns lining her skin ripple and shimmer with light.

“I don't want…I don't want to hide it from you, but…” Rumi's voice hitched, deeper and raspberry than you've ever heard it before. If you weren't so concerned about whatever was wrong with her, it would probably have you…a little excited. OK, focus.

“Rumi, you can tell me anything. You know that. I won't ever judge you for whatever you're going through.”

You raise your hand up to her shoulders, planning on just giving her a small bit of physical affection, only for the grace of your skin on hers igniting a borderline obscene moan to ring from her throat.

Both of you go still, unsure of what to do next. You move so you're sitting next to Rumi, able to see her glowing eyes staring ahead of her before she harshly shuts them, unwilling to witness your reaction to her reaction. You're just about to comfort her, to reassure her that even feral moaning isn't enough to deter you from trying to help her, when you see the slightest movement from below you.

From her pants. From the bulge in her pants.

For a minute, you just…stare at it, unsure if you can register exactly what you're looking at. At first, you think she wore her strap-on and her desires were giving her an extreme case of phantom limb, but if that were the case, it wouldn't be glowing. And twitching.

“Is that…is that a-?”

“Yes. It just…appeared, and no matter what I do, it won't go away.”

The thought sends a rush of heat straight to your core, your kind already picturing a desperate and flushed Rumi spread out on her bed and frantically trying to ‘beat’ away her problem. It makes so much sense that she would insist on going through this alone, scared that this would be your tipping point and you'd leave her and her demonic weirdness behind you.

But that wasn't you. What kind of girlfriend would you be if you didn’t stick by her side to help her with this?

“Let me help you.”

Her body bolts up straight, and her eyes find your gaze, wide and puzzled. “You don't have to do that! I don't want you to…to force yourself-”

You cut her off from making any more self-deprecating comments when you lift your hand to cup her cheek, silently reveling in the soft look she gives you and the giant rumble of a purr on her chest.

“You would never force me to do something like that, Rumi. I’m doing this because I want to. Really, I don't mind it.”

And you let your want for her, for this, slip through your voice, if her change in demeanor is anything to go by. Instead of insecurity, you can see hunger in her brown eyes, her hand twitching before she rests it on your thigh and grips.

“You’ll tell me if I’m too rough.” She asks, no, she states, pushing you by the shoulders firmly onto the bed before she adjusts her body to hover over yours. You don't know if you want to stare at first; her glowing eyes, her glowing skin, the literal demon cock straining the fabric of her shorts.

“I will. I promise, Rumi.”

And that was all the assurance she needed to take you apart.

She got you ready for her, of course, there was no chance you were wet enough to take her dick. By looks alone, it was bigger and thicker than any dildo you've ever used. You have no complaints when she ferally rips off your pants and your underwear, spreading your legs apart and diving face-first into your cunt.

“Rumi, oh my… god!” You shot, overwhelmed with the way she licks and slurps at your entrance and sucks on your clit. If you could pay even a speck of attention, you might’ve noticed that even her tongue was different, elongated and twisted in the perfect way to stick it in and out of your cunt. When the pressure grows to be unbearable amount, she easily holds you down by the hips to continue her ministrations, not stopping until you've come on her face and you start to wiggle too much for her to convince herself to keep waiting.

She stands up, and you both hurry to yank down her pants, your mouth agape when you get an up close look at her new appendage. It really is thick, the skin tapering off into an unnatural purple color. The closer it gets to a tip, the familiar jagged lines of her patterns decorating the skin and pulsing just like the ones on her body.

Tentatively, you bring a hand up to it and graze your fingers over the tip, admiring the way it twitches towards you and the smear of precum that it leaves on your fingertips. You look into Rumi's eyes, wanting but mused by a twinge of insecurity, and before you can think of a better way to reassure her of your desire, you bring your head forward and lick a long stripe up the length of her cock.

The sound that leaves your girlfriend's throat is unlike anything you've ever heard before, bordering on a growl that only makes you feel like prey. Her hand grips your hair and pushes you until you're throating her cock, mouth aching as you let her use you as she so pleases. It tastes odd but not unpleasant, and you find your own hand inching down to your cunt as she continues to fuck your throat and make her pleasure incredibly audible.

It was definitely a good thing that Mira and Zoey left when they did; you didn’t even want to imagine their faces when the two of you stepped out of this room.

Before you can finish the thought, Rumi's hand is yanking you off of her dick, creating a loud Pop! sound and making you whine in the absence of her already.

“’ M sorry, was just. Too close, need to be inside.” Rumi whimpers, hands maneuvering you up and flat onto the bed as she rests between the junction of your legs, the length of her resting on your drenched folds, and drawing both of your eyes down to the sight.

A part of you was still unsure the thing would fit inside of you, but you’d be lying if you didn’t say that the thought of such and the view of just how deeply it would reach inside didn’t arouse you.

When she finally eases herself inside of you, you both groan out of relief, Rumi's eyes glued to the sight of your pussy being split open on her cock. To test the waters, she thrusts just half an inch inside suddenly, finding a sick delight when you whimper and grasp at her arms.

When you notice the pain inside you has dissipated and morphed into pleasure, you raise your hips, eager for her to move. She starts to thrust her hips, increasing the speed with every new moan and scream that slips from between your lips at the euphoria you feel at being split open with her. All she can focus on are your sounds and the feeling of your walls around her, her eyes rolling back into her head with every clamp and squeeze you give her cock.

You notice that Rumi is mumbling, trying your hardest to focus on what she's saying and not the mind-rattling feeling of her trying to fuck all the thoughts out of your head. It doesn't help you when you finally understand what she's saying, repeated mumbles of ‘love you, love you I love you-’ and ‘so perfect, feels so perfect for me, baby’ only driving you further up the wall.

In a desperate attempt at more, she grasps the underside of your legs and pushes them up and up and up, all the way until you're holding them above your head and shocked and how flexible you seem to be, or rather how flexible she's seemed to make you. Still unsatisfied with her reach, she adjusts herself until her hips are directly above yours, and now, instead of her cock just thrusting back and forth, she's slamming herself down into you, hitting every sensitive spot inside of you with ease.

It doesn’t take long until you find your release, throat hoarse and raw with your continued moaning while you twitch and squeeze around her. Rumi only continues to pound through it, eyes stuck to the sight of your cum leaking out of your hole and coating the base of her cock every time she pulls out.

Yet still, she doesn’t stop, chasing her own release. You can see the physical toll it's taking on her, her braid mussed to hell and sweat dripping down the sides of her face. In your fucked out daze you bring a hand up to her face, cupping her cheek and bringing her eyes to look into yours. She presses her forehead to yours, not breaking eye contact as she continues to use you for her own pleasure.

“I'm close, I'm so close.” Rumi gasps, so close that her lips move against yours when she speaks.

“I know, baby. Come inside me. Please, Rumi.”

And like your words were a command, she did, groaning and using her last bit of energy for a few hard thrusts as she comes inside of you. And her orgasm is long, to the point where she has to flop herself onto you as it wrings her dry.

Once it ends, you're both silent aside from heavy panting, still sweaty, and putting together the pieces of what just happened. You run your fingers through Rumi's hair, hoping to further relieve any leftover stress in her body.

“Thank you,” Rumi whispers, nuzzling her head deeper into your neck.

“Of course. I'll always help you, no matter what.”

You brush your fingers down to her face, happy when she presses a kiss to the palm of your hand. For a second, you feel nothing but warmth, happy to exist in this innocent moment with her.

And then you feel it. Your touch must have set a part of her off because her cock is already hardening inside of you, her hips involuntarily twitching towards you while she whines.

“How about I get on top this time, yeah?”