Promise

Promise
You had been sloppy drunk when the statement left your lips, "I bet Jungkook would be a GREAT Dom in bed."
The rest of the guys had been drinking and took your bold statement as a joke, laughing at how pink your cheeks became after realizing your thoughts had been spoken out loud. Your boyfriend, however, had been perfectly sober, and took that statement, as a challenge.

Which is what lead to your current predicament; blindfolded, bound, and gagged in the center of Jimin's practice studio. The heavy click of his boots echoed against the hardwood floor, making your heart race and your muscles tense. The sound of his melodic voice startled you when he finally spoke, "So you think...that Jungkook would make a 'great dom in bed' hmm?" His fingers trailed over your shoulders, twisting into your locks and pulling your head back, "You think he could fuck you better than me?" He let go of your hair, his footsteps moved to the front of you, his breath fanned on your neck, "You think he could make you cum as hard as I can?" His plush lips pressed to your neck, sucking your skin into his teeth, marking you with a beautiful bruise.
You moaned behind the gag, pulling against the silk scarf. Jimin laughed, ringed fingers caressing your cheek, "Do you think, he could make you beg like I can?" He removed the gag, immediately replacing it with his fingers. Instinctively, you began to suck and lick his fingers, swirling your tongue along the cool metal of his rings.
He leaned forward, pushing a lock of hair away from your face with his other hand, "Look at you, my perfect little slut. Do you see how well I have trained you? And yet you still have the audacity to think, that Jungkook, my perfect little brother, would be a great dom in bed?"
He removed his fingers, claiming your mouth with his lips, tearing your shirt clean in half to reveal your bare breasts, nipples pebbled just for him. His hands took one in each, cool rings making the sensation of his movements that much more intoxicating. He left your mouth, taking in how gorgeous you looked with your swollen red lips, the way you arched your back into his touch. He plucked a nipple with his forefinger and thumb, rolling the sensitive nub before securing his plump lips around it. Your moans were music to his ears, while he shared his talent with the world, he wanted yours all to himself. His hand skimmed down your waist, hiking up your skirt to tease his prize. He stroked your clothed sex, loving the whimpers that came from your lips. "See? See how I have you?" He pushed the flimsy cloth to the side, groaning at how slick you felt, sliding one finger up and down between your lips, but not giving you the friction you needed.
You pulled hard against the restraints, the beaded texture on the silk of his scarf biting into your wrists, "Jimin, please."
His finger pressed in the slightest, but still not enough, just teasing the tip of your clit. "Using our words now, are we?"
You threw your head back, "Fuck Jimin, please! It's not fair!"
His finger pulled away entirely, his grip returning once more to your long locks, "Not fair? I think it isn't fair that my filthy little slut, mouthed off to the rest of the group. What if now they think that I'm not enough for you? What if they think, they could be, the dom that you need?" With every word, his voice dropped lower and lower, until you could feel his breath fanning against your wet slit. Every nerve suddenly caught fire with the slightest touch of his lips to your thigh. "What do you think, baby girl? Is my thinking fair?"
You struggled to force the words between each panting breath, "Jimin I'm sorry! I'm sorry I said that, I promise it won't happen again! I promise! Please!"
He licked a long swipe, gathering your arousal onto his tongue, and capturing you in a kiss, forcing you to taste yourself on him. "My filthy girl," he whispered against your lips, diving again and devouring your cunt with such a fervor you couldn't stop the moans from escaping your lips. Your hands curled into fists, nails digging into your palm as you felt the building wave of your orgasm, "Yes Jimin, right there. Please. Please. Please!" Your pleas fell to deaf ears, the dancer giving your thigh a sharp slap, leaving you teetering at the edge of your release.
A sigh filled the air, the clink of his belt following, "Look at you, such a whimpering slut. Do you think Jungkook would know how to handle you?" The tip of his cock touched your lips, your mouth opening and taking just the head onto your tongue, "I think he would have given you what you wanted ages ago." He shallowly thrust into your mouth, breathy moans clashing with the tone he was using with you, "But I'm a great dom, that knows exactly what his doll wants."
He gripped your chin, forcing your jaw open even more, feeding his warm, heavy length into your waiting mouth. "I know you want to be completely used, fucked out of your mind, throat full of my cock."
His words filled your soul, his cock hitting the back of your throat, moan after moan vibrating around his thick length. The tingling of your orgasm returning with the satisfaction of being used. You could hear his breath hitching, moans reaching that lovely high pitch. You swallowed around the head of his cock, ripping a groan from him, his other hand tangling in your hair to pull you off him.
"Naughty, naughty girl. Are you that hungry for my cum?" He fucked your face, giving you barely enough time to take small breaths between each thrust. "Take it, slut. Take it how I trained you." He let out one final moan before stilling in your mouth, your own release appearing the second his cum landed on your tongue. You swallowed every drop, panting, throat sore, and body buzzing with the afterglow of your release. You heard the clinking of his belt as he put himself away, then felt his fingers untying your hands, and removing your blindfold.
He pressed a soft kiss to your forehead, cupping your cheeks and making sure you were okay. He held you tightly against his chest, smoothing out your hair and kissing every inch he could. "I promise, you will always be mine."