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Im Nayeon was upset, and did little to hide it.

It was all you could do to give her a polite nod. She responds with a glare as she returns to the half-eaten bowl of cereal on the kitchen table, her midnight meal interrupted by having to open the door to Twice’s dorms for Mina and yourself. You’d never seen someone eat cereal angrily - you didn’t know such a thing were possible - but Nayeon was certainly doing just that, her jaw working furiously at the crunchy wheat flakes, eyes still dripping venom as you and Mina make your way from the foyer and into the kitchen.

“Is she ready?” Mina asks, her tone flat, as though she neither noticed nor cared about the scowl on her group member’s face.

“Yes,” Nayeon answers, the word half grunt, half curse.

“Good,” Mina replies, not sparing another thought to the older woman or the daggers in her eyes. She begins to head off towards the hallways that held Twice’s bedrooms, chin up and expression neutral, as though she hadn’t just had dirty, filthy sex in a private karaoke room not even an hour before - and as though she weren’t currently carrying two loads of her boyfriend’s semen between her legs.

You find yourself scurrying after her, not quite sure what was about to happen but knowing above all that you didn’t want to spend a moment alone with Nayeon. You could see how she could have been upset at the evening’s turn of events - Mina had denied her the privilege of your orgasm inside her - but you knew there was little you could do to assuage the situation, at least not without Mina’s help.

And so you settle for giving her an awkward half-smile as you leave the kitchen, one that is returned with a glare that sent a shiver of fear running up and down your spine. She shoves another spoonful of flakes into her mouth, chewing them angrily as though she were taking out her frustrations on the helpless, sugary sweet cereal.

You follow Mina into the hallway. Being Mina’s boyfriend meant you were a relatively frequent visitor to Twice’s dorms, and with this familiarity came the knowledge of who slept in which rooms.

When Mina opens the door to the first bedroom on the left hand side of the hallway, you feel a delightful sense of anticipation tingle in your loins.

On the bed in the centre of the room is Hirai Momo - on her knees, with her hands bound above her head by a pair of handcuffs. The handcuffs are attached via another length of chain to a ring installed into the room’s ceiling. 

The question of how or why such a contraption would exist in one of the bedrooms of the nation’s top girl group didn’t cross your mind, not even for a second. Not when the image of one of the sexiest women on Earth, bound and near-naked, demanded every ounce of your cognitive ability.

The Japanese girl is wearing a set of lacy red lingerie - a scant bra and panties, neither of which did much to hide the plentiful charms of her body. She was well known for wearing the skimpiest outfits of her group while she was on stage, and you were glad to see that this wardrobe preference extended to the bedroom. She was, however, wearing one item that was unique to her bedroom attire - a red silk blindfold.

To say she had an amazing body would have been a vast understatement -she seemed crafted from the deepest desires of every heterosexual male on earth. All curves and valleys and smooth, creamy skin, she seemed sometimes like she was sculpted or drawn by the hand of an artist. Her stylists had clearly recognized her physical gifts and did well to dress her in fittingly enticing outfits on stage, where she was a wonder - the object of plenty of male fantasies the world over.

But here, in the bedroom, near naked and minutes away from committing what was probably going to be the most sinful of acts, she was outright enrapturing.

Mina walks right by the bound woman as if she were a piece of furniture and not one of the most gorgeous women on earth. She walks over to the small boombox on one of the nearby shelves and pushes a couple of buttons on it until she finds the track she wants - one of her group’s recent singles.

I know I want it, I don’t wanna hide, pretending I don’t want it

“A little mood music,” she explains. “And to keep our dear roommates from complaining too much about the noise we’re about to make.”

You manage to regain enough control over your bodily functions to nod stupidly at her, unable to do much else. Mina smirks, before walking over to the bedroom’s dresser.

“You can take a seat, babe,” she says, motioning with her head towards the simple folding chair carefully placed at the foot of the bed. “Unfortunately, you won’t be an active participant in this little part of your present. As I’m sure you know, our dear Momo here has a boyfriend.”

You obediently take a seat where you were told. You were well aware of Momo’s relationship status and were of course unwilling to do anything to threaten it - although you would have been lying if you’d said a small part of you weren’t at least a little disappointed.

Mina steps towards the cabinet standing against one of the room’s walls, where an array of items were lying, perfectly and carefully placed, upon a sheet of red velvet.

“Thankfully, her boyfriend has no qualms about her having fun with other women,” she says, aloof and nonchalant, dragging her index finger slowly across the items on the cabinet as if she were perusing jewelry at a store instead of what you now realized was an array of sex toys. “So you’ll just have to sit there and enjoy the show.”

I’m not worried, what you’ll think of me when you see what’s inside me

You gulp. Watching your girlfriend have her way with one of the hottest women on earth? You were certainly in no position to complain.

“Don’t worry,” she says. “I’m sure the other girls will make up for it.”

Mina’s finger finally lands on an item. She picks it up from the cabinet - a large, veiny black rubber dildo. She tosses it, casually, onto the bed, where it lands close to Momo’s knees. The older Japanese girl lets out a soft whimper at the feel of it against her skin.

Your girlfriend continues her browsing, before settling on another item. She nods to herself, seemingly satisfied with her selection, before turning to you.

With her other hand she pulls the blue sweater from her torso, before quickly undoing the button to her short black skirt, leaving her only in her thigh high black socks. Momo’s body was a delight, of course, and you’d seen Mina naked almost weekly since you’d started dating, but seeing her undress still managed to capture your entire attention.

‘Cause I know you, I know you

Your girlfriend finally makes her way onto the bed, but not before grabbing the second item she’d selected from the cabinet - a pair of black scissors.

You gulp - you’d been doing a lot of gulping, your mouth seemingly producing an unending supply of saliva - and watch, enraptured, as Mina gets on her knees behind Momo.

“She’s beautiful, isn’t she?” Mina says. Her voice is casual, her tone plain, as it always was in these situations. The way she remained so nonchalant and detached during sex spoke volumes of her self control - and her own sexual confidence.

“This body - my god. I mean, I’m not terrible myself, but damn, what I would give to have this body for a day. Don’t you agree, baby?”

Don’t look away, look in my eyes

You nod, quite unable to do much else. From over Momo’s shoulder, a devilish smile raises the corners of Mina’s mouth.

Your girlfriend places her left palm on Momo’s left hip, and the older girl whimpers at the touch, her body already quivering in anticipation. Mina’s hand traces a lazy path up her toned, flat stomach, before finally reaching Momo’s ribs, just beneath her left breast.

“I do believe she’s a little overdressed for the occasion, though. She’s quite the birthday present, isn’t she, baby? I’ll unwrap this present for you.”

The scissors in her right hand suddenly flash into view - a gleam of bright silver against Momo’s pale skin. You are momentarily terrified at the sight of such a potentially dangerous tool - but you are equally aroused by the premise of what they might do.

You’ll think of me, you’re hypnotised

A deft movement of her hands, stainless steel cutting through silk, more delicious, creamy skin exposed - all in a matter of seconds. An expensive scrap of cotton and silk ruined, when it could have been removed in a traditional way with the clasp behind her back  Even before your eyes could register the newfound toplessness of Hirai Momo you catch a glimpse of Mina’s smile from over her shoulder - a smile that said but where would the fun be in that?

You’re gonna say more, more, more, more, more and more

Even before you can truly savor the sight of Momo’s round, perfectly shaped breasts, the silver flashes again - and this time the girl’s panties are sliced through at her right hip. The severed silk strand hangs there momentarily, suspended against her body, as though it had not quite realized it was still privy to the whims of gravity. Then it falls away from her hips, cut clean through, like a scene from an anime.

Two seconds, two flashes of silver slicing through soft silk - and Hirai Momo was naked atop the bed. 

On stage she was gorgeous; in lingerie she was breathtaking; now, fully naked aside from a red silk blindfold, on her knees with arms bound above her head, she was utterly sublime.

Can’t help but say more, more, more, and more

Mina’s left hand, previously resting just below Momo’s left breast, slides down the girl’s body, back down her slim side and across full, round thighs before grasping the black dildo by the base.

I wanna have more, more, more, more, more and more

“Baby,” she says, the single word jarring you from your entranced state - and it is at that moment you realize you needed to breathe in again to fill lungs that had suddenly forgotten just how to operate. “Don’t feel like you just have to sit there. You can… enjoy yourself.”

In any other set of circumstances you would’ve felt more than a little awkward at the idea of pleasuring yourself - but Mina’s command, as it always did, chased all those hesitations away. Personal hesitancies, societal norms - none of it mattered compared to what Mina wanted. Before you knew it you’d unbuttoned your jeans, freeing your painfully stiffened cock from your boxers before quickly wrapping your fingers around your shaft and giving yourself your first delicious strokes.

As you begin to touch yourself, Mina places the tip of the dildo at Momo’s dripping, glistening entrance - and slips it inside her.