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seokmattchuus · 3 months ago

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Prove It - Seok Matthew (Extended Ver.)

A/n: 1. Ignore the gif, I found it in my files and decided it was The One™ 2. A single person asked for this and who am I to deny them (I have had the worst writers block, and this was doable). You're welcome, or I'm sorry, I don't know. 3. I don't remember if this was proofread.

Coming home early wasn't an often occurrence. Being a teacher, you were technically supposed to be home an hour after dismissal, but realistically, you weren't home till early evening. Today, however, was a half day, and you were more than happy to be able to spend the rest of your day cuddled up with your boyfriend.

You didn't expect to walk into an empty home, but you perked up when you heard him on the phone in your shared bedroom. You excitedly placed your bags down and made your way to the room, your hand reaching for the door before the sound of the other person speaking up stopped you.

"Does it ever kill you that she's two years older?" You overheard Hanbin through Matthew's phone. "I mean. Everyone knows you like being called 'oppa', are you okay with her never calling you that?"

"It's not like she hasn't called me it before." Matthew scoffed. "She's called me 'oppa' plenty of times." He was lying, but Hanbin didn't know that.

"Playfully, probably." Hanbin's voice flattened.

"Dude. It's not a deal breaker." Matthew defended. "So what if she doesn't say it? It's not like I'll die if I don't hear it." He paused. "Besides, she's a foreigner. She barely uses honorifics with anyone."

"I see how your ears perk up when girls call y-"

You quickly removed yourself from earshot. Your eyes quickly scanning for the quietest way out of the area.

You slowly made your way back to the door before opening it and closing it harsher than before so he could hear.

"Babe, I'm home!" You called, staying in place in case he made his way towards you.

There was a moment of silence before you heard him coming out of the room.

"You're home early." He smiled at you. He really didn't look like he was having the conversation he was. "I was expecting you a little later."

"You say that like you had plans." You raised a playful brow. "Don't tell you threw her in the closet?"

"Closet?" He scoffed as he made his way towards you, throwing his arms around you. "She jumped out the window when she heard you pull up."

You both laughed as he placed a kiss on your cheek, and you wondered if he really meant what he said.

"So why are you early?" He smiled as he pulled away, leading the both of you to the couch.

You'd never used honorifics, he was right about that, but you wanted to test just how 'okay' he was with you not calling him anything.

"I was grading papers with Taekwoon oppa." You scanned his face for a reaction. "He's been helping me a lot with Korean. I'm even getting more comfortable with honorifics." You put a smile on your face.

"Oh?" He said, his tone unreadable. "Who else do use honorifics with?"

His voice trailed off and it killed you inside. You shouldn't have said anything, but why wouldn't he just tell you to call him that to begin with? You would have gladly done it. But with how he seems to want to keep it hidden, how could you bring it up first? What if he said he didn't mean it or brushed you off?

"Just him for now." You nodded. "Everyone else around me is either my age or younger." You shrugged. It was true. The school you worked for was relatively new, so it was full of mostly new graduates. The only people older than you were admin, but you rarely ever ran into them because Taekwoon handled everything as the head teacher.

There was a silence that took over and you shuffled in your spot.

"What made him the first guy you use honorifics with?" His gave you a glace, a firm hand falling on your knee. It would have been harmless had you not known the context.

"He takes care of me a lot." You started, and his hand on you tightened. "He's also always looking out for me. He took the blame for a couple of my fuck ups, too."

You paused as you thought about your next statement.

"And he's not a 'guy' to you. He's a hyung." You corrected him, trying to sound like you were upset over it.

He rose a brow at you.

"Not the foreigner correcting my Korean." He scoffed, his annoyance growing the longer you talked about him.

"Tough talk for another foreigner, Mr. Maple." You reminded him. "And you can't blame me for assimilating." You shrugged, the silence slowly creeping back in your space.

"He is some guy to me, though." His hand removed itself from you. "I'm literally always taking care of you, too." Disbelief coated his tone as he turned to fully look at you. "That time when you got too drunk at your staff party and I carried you home." He started. "That time when your ankles were cut from your shoes being too tight so I ran to get you some slippers and a first aid kit from the nearest convenience store." He continued, his speech picking up in pace. "Not to mention I always take you your stuff before you even realize you've forgotten it." He paused. "Doesn't that count as taking care of you?"

There it was.

"I'm older than you. Not to mention we're dating. I thought you were just being caring. In love and all that." You reminded him. You were going to get him to air it out. "I think you keep forgetting that aspect." You sighed. "When an older person takes care of you, it's different."

"I'm younger but you had no problem calling me 'daddy'." He scoffed at your reasoning, landing him a pillow to the face. He spoke up after recovering. "Calling me 'oppa' wouldn't kill you."

"That was just once." You muttered in defense. "And I was drunk." You cleared your throat, surprised at how quickly the conversation turned.

"Keep telling yourself that." He rolled his eyes. "Besides, it wouldn't hurt to say it just once." He leaned in, his face right in front of yours. "I won't tell anyone." He said in a sing-song voice.

It was your turn to snicker now. You expected him to take the jealous route, not playful. But there was a part of you that wanted to see where he was going with this.

"What's it to you?" You tilted your head. "I thought you liked being my little baby~" You teased, your hand going to pinch his cheek. He groaned, swatting your hand away.

"Because I'm not a little baby." He narrowed his eyes at you. "It's two years between us. Not twenty." You watched as he kept the look on his face.

"How about this." You started. "I'll say it once."

"How about always?" He was quick to respond, giving you his best puppy eyes and you couldn't help but want to cave.

"Since you want it so bad," You paused, watching his expression turn expectant. "What do I get if I do it?"

His eyebrow twitched as the latter part of your sentence came out.

"How about a bet, then?" He smiled as he leaned over you, your back gradually leaning until you were laying on the couch. "If you can keep quiet until I'm done with you, I'll drop it."

You swallowed at the sudden shift in atmosphere. Did a simple title mean that much to him?

His arm moved to support him while he hovered over you and you could feel his thigh moving to press on your own in an attempt to open them. The little amount of space giving you no room to try and fight it.

"But if you can't." He smirked, his head dipping down so his lips were brushing lightly against yours. "You can't call me anything else."

His thigh had succeeded in passing yours and you let out a shaky breath at the contact. His eyes flicked towards yours and you saw the corner of his mouth curve into a smirk.

"Deal?"

It wasn't like you to give in so easily, even if you looked like you would. But something about seeing this side of him made you want more. Despite the tiny age gap you had, he didn't submit to you, and you never dominated him. But there were lines you never really crossed when it came to sex. He never pushed you too hard and you never tested him.

Until today.

"We have a deal." You mimicked his smirk as you toyed with the top button of his shirt. "But what do I get if I make it?" You tilted your head slightly as you freed the top button, working your way down.

He closed the gap between the two of you, his lips working gently against yours as he let out a shaky breath from your cold hands grazing his torso.

"You're already losing, baby." You smirked as you pulled away, giving him your most innocent gaze. "So much for being an 'oppa'." You whispered the last part.

His thigh finally pressed firmly against you, your pencil skirt riding up with it. You stiffened at the force but stayed quiet.

"It's a matter of pride at this point, baby." You smiled sweetly as you pulled his shirt down his shoulders, your fingers softly running over his arms in admiration. "If you want to be an oppa so bad," You paused as you licked your lips.

"Prove it."

"I just realized." He smirked as he used his free hand to pull his shirt completely off. "I've never called you noona to your face." He chuckled before getting up and walking backwards. "Only to others when I'm talking about you." He was leaning on the corner of the wall.

"Is this your way of accepting you're not oppa material?" You sat up, partially annoyed that he just up and left you.

"No." He said. "I was expecting you to follow." He turned and kept walking, his back disappearing from view. "The bed's bigger than the couch, y'know." He called out.

Your eyes squinted at the thought of what he was planning but you were also too worked up to care. You slowly got up and made your way to your shared bedroom, partially taken back when you saw the bed empty and Matthew standing by the door.

"Go ahead, noona, lay down. Get comfortable." He nudged with his head and you stared skeptically.

Despite your doubts, your hands moved to remove the skirt, your hips swaying as you pushed them down. You watched as he looked you over before you moved towards the bed and sat down.

"Pretty boy," You started as you removed your own shirt, smiling as his eyes went straight to your chest. "Noona doesn't have the same effect on me," You paused to slowly trail your hands behind you to undo your bra. You lightly tossed it off the bed before you were back on your chest, fingers gently running over your nipples as you whispered your next sentence. "As oppa does on you."

His jaw tightened as he watched you, and he was tempted to throw his whole plan out of the window. Sure, it was a stretch to think the word would work on you, but you miss all the shots you don't take.

"What can oppa do to me that I can't already do to myself?" You challenged as you rose a brow, your hands moving to your underwear and slipping inside. It was about time you got somewhere with this.

"Show me how much you can do then." His thumb was digging its nail into his index finger as he watched you. "But don't cry about it when you can't make yourself cum."

There was a minor truth to his words. Since the start of your relationship, you'd never needed to touch yourself or use your toys. He'd left you more than satisfied and now you were nervous your shit talking was about to backfire.

You moved back until you were snug against the headboard, your eyes darting towards the nightstand where your toys laid.

"Don't you think that's cheating, noona?" He tsked. "You said what you could do. Toys don't count." He smiled slyly. "Besides, the last time you used them, they were in my hand." He scoffed at the memory. "And you couldn't keep too quiet."

You momentarily forgot about the deal, and you scratched the idea. Your eyes fell back on his and you reached for the waistband of your underwear, slowly peeling them off before tossing them to the side. You didn't miss how his eyes traced every move you made, but you didn't call him out on it.

You didn't bother teasing yourself. Not only because you were already turned on, but this wasn't about getting off; it was about making him cave. It was also about being able to stay quiet. If you weren't committed, it'd be easier to win.

Your hands were quick to slide past your clit and into you. Your fingers weren't as long as his, giving you absolutely nothing. You let out a small, frustrated sigh.

"I heard that." He was quick to call.

"But you're not the one causing it." You countered. "So, it doesn't count." He rolled his eyes.

You were both too stubborn to cave, your egos too strong to want to admit defeat. But maybe he'd cave if you put a little more effort into your show. He was always quick to jump at a chance to please you.

When he saw you avoiding your clit, he knew you were stalling. His head tilted slightly as he watched your squirm from the lack of stimulation.

"I can help." His voice was sickly sweet, and your stomach tightened. "You know I'm better at this than you are." He moved towards you, slowly getting on the bed.

His words were proven true when he slapped your hand away, quickly replacing it with his own. Your mouth fell open in a silent moan, eyes closing when his thumb met your clit.

"You're all talk noona," He tsked. "I don't know why you make things harder for yourself."

You couldn't respond. You knew the second you opened your mouth, you'd make a sound that would count against you. You weren't even sure if he was keeping count or if you'd lose the second anything slipped out of you.

"What's wrong, baby?" He teased, using the same tone you did when you called him the same name earlier. He angled his fingers, a surge of pride flowing through him when a whine came out of you. "There she is~" He cooed, his thumb running harsh circles against your clit.

This was about getting you off. And his actions mixed with the way he looked down at you had you clenching. It was embarrassing how quickly he turned things around.

"Don't tell me you're cumming already?" He pouted down at you, quickly removing his hand, letting out a sadistic laugh when your fist balled up to keep quiet. "Where's the fun in that?" His fingers ghosted over your legs, the feeling making your thighs shake.

"Maybe I should make you beg me to let you cum." His eyes lit up at the thought. "You'd definitely be a mess at that point, no?"

"That's not fair." You were sporting your own pout this time while you tried to control your breathing. "So much for not cheating."

"Don't look at me like that noona." He tilted his head to the side, his fingers slowly making their way back to you. "All you had to do was say one little word but no," He cooed at you. "You wanted to make it interesting." He held back a laugh as you flinched when his finger ghosted over your clit. The corner of his lip twitching into a smirk instead.

"You could have told me you wanted me to call you that little word." Your voice was strained as he kept his contact light. "I would have done it, y'know."

His eyebrow rose, but he rewarded your hypothetical compliance with more pressure.

"Well, when you put it that way," He started, his finger working faster against you. "It makes this little bet seem worthless, no?" He licked his lips when your hand came up to grab at his forearm. "Too bad my ego's already bruised."

His free hand moved to grab your wrist before collecting the other one and pinning them above your head before his fingers were back in you. Same angle, faster pace.

You really chose the wrong button to push.

"C'mon, noona," He rasped when you immediately clenched around him again. "Just give up, already." His tone was softer, trying to coax you before leaning down and taking one of your nipples into his mouth. His teeth pulled at it while looking up at you. He let go, placing a kiss over your breast. "Wouldn't it be more enjoyable if you didn't have to fight it so hard?"

You let out a shaky breath. As much as you wanted to, something inside you refused to let yourself fail that easily. But at the same time, his fingers just felt too good.

"I know you're close," He groaned. "I can feel it." His eyes softened, pleading while letting out a moan of his own. "Just let go, noona."

His moan trigged something inside you and your legs shook as a pathetic cry slipped past you. You couldn't help the whines that followed while he helped you ride out your orgasm, his thumb hitting your clit intentionally. His hold on your wrists constant while he let you come down.

"Sounds like you lost." He chuckled and your eyes widened. You were about to cut him off and accuse him of cheating when he spoke up again.

"Did I take care of you?" He asked innocently, his hand slipping away from you and towards his mouth, his mouth covering them to clean them. His eyes stayed on yours until he finished. "In a way that Taekwoon couldn't?"

You didn't bother entertaining him. Too focused on trying to get your wrists out of his hold.

"We both know I'm stronger than you." His hold tightened and pushed your wrists further into the mattress as if to prove he wasn't using full force. "So, let's not embarrass you anymore."

"I'm not embarrassed. I'm mad you cheated." You narrowed your eyes at him. "Don't think I missed the mild overstimulation you tried."

He shrugged his shoulders, a sly smirk growing.

"It was an accident."

You fought more in his hold, wanting to wipe the smirk off his face.

"I'll let you go if you ask nicely." His smirk was now fully on display, giving your wrists another squeeze as if to remind you of the bet.

You both held eye contact as if the other would cave the longer you stared. He played dirty and you were still upset.

"If you say it, I'll give you a reward~" He cooed and you tried to buck him off of you, your face reddening as the situation wasn't in your favor. "Say the magic words and it's all over." He smirked, radiating pride as he watched you struggle.

"Let me go, please." You narrowed your eyes, still defiant. Even when he leaned back over you, his eyes right above yours.

"Try that one more time." There was a shift in his tone that had you swallowing hard.

You took a deep breath.

"Please, oppa." You said through gritted teeth. "Let me go."

You saw his lips tug again.

"Since you made me jealous earlier, don't you think it's fair I get to do the same?" He tilted his head and your eyes narrowed at him again. He debated on if his next sentence would land the way he hoped. "Say it the way Ji-"

"Oppa," You put some sweetness in your tone, a stark contradiction to the sudden strength your gained in trying to get out his hold. He was momentarily stunned before regaining control. "Please let me go."

"Well now I'm scared." He started.

"Don't be, oppa." Your eyes were already on the pillow to your side. At least he could die happy. "Why would you be scared of little ol' me."

"Actually. We can just chill right here." He nodded. "Neither of us have plans."

"Matthew." You started. "You have three seconds." You smiled up at him. "If you're such an oppa, I shouldn't be this scary to you."

He reluctantly let you go but was quick enough to jump to the other side of the bed to avoid you lunging at him. You were also just as quick to grab the pillow and make it on top of him, the pillow colliding with face.

"Who was she?" You said as you hit him again.

"I made up a name! I swear!!" He yelled before grabbing at the pillow and throwing it. His hands grabbing your wrists again when you reached for his shoulders. "Pinky promise." He tried, bringing your hands to his lips so he could press a kiss to them. "How can I make it up to you?"

You gave him a frown and moved to get up, his hands moving to your hips to keep you in place.

"C'mon~" He whined. "There has to be something."

He was too cute to stay mad at. You'd get him back later.

"You could start by joining me." You motioned to your naked form. You got up to give him space to work with.

"You gotta admit, though." He watched your face as his hands went for his belt. "Calling you noona did do something for you." He gave you a knowing look. "I've never made you cum that quick."

"Do you not remember you moaned when you said it?" You gave him a small slap against his chest while he threw his belt to the side. "And you did that thing where you made your eyes all cute." You slapped him again, his laugh filling the room. "You could say anything acting like that and I'd probably cave."

"Really, now?" He smirked at the confession, his hands moving to unbutton his pants, the sound of his zipper following. "Then forgive me for the jealousy thing." His eyes held the look you just described. He let out a small 'hm?' that sounded too much like a moan.

"Oppa was wrong."

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