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parkjihoonswifey · 1 month ago

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Saw your requests were open and thought about a childhood friends to lovers with Yeon Sieun x reader? Slightly suggestive if ya want some spice, but it’s not necessary :D I’ll most likely come back and request for more weak hero content

Could I be 🐍 anon?

Thank you!

A/N: this has been sitting in the requests for a hot minute, so I'm happy to finally get it out.

Title: Assumptions

Pairings: Si-eun x Fem!Reader

Warnings: sexual content, slightly suggestive.

enjoy!

it all started when you were both two. He had just moved into the neighborhood, and you were an outgoing curious little girl. You had made your way over into their driveway somehow, where little si-eun stood, playing with some action figure. You had excitedly ran up, introducing yourself. He didn't say anything, but you kept trying and asked what he was playing with. He stared at you with a blank expression before handing the action figure to you. "Optimus prime. Keep it." You celebrated and excitedly hugged him before your parents had come out of their door, calling your name to come back inside.

"Thank you um—"

"—Si-eun"

"Thank you si-eun!" you exclaimed, planting a small kiss on his cheek before running back to your parents, who asked where you got the toy from. You cheerfully explained, si-eun was listening to the whole thing.

⋅•⋅⊰∙∘☽༓☾∘∙⊱⋅•⋅

Growing up side by side in the same quiet neighborhood, you and Si-eun shared a bond that ran deeper than most childhood friendships. You both built forts out of cardboard boxes, raced bikes down the hill, and traded secrets under the old elm tree at the park. From the time he had moved into the neighborhood, you were inseparable—not out of romance, but simply because of the understanding you guys shared with each other in a way few others did. Si-eun was always a quiet kid, and you never pushed him to speak. Even with little words, you could read him like you wrote the book yourself, he was basically you as a boy. But of course being a boy and a girl who spent nearly every waking hour together made you the target of constant teasing.

Every other kid in the neighborhood seemed convinced you were boyfriend and girlfriend. No matter how many times you and Si-eun made gagging noises or scowled at the suggestion, the rumors never stopped. Even classmates at school chimed in, whispering and giggling whenever you two sat next to each other in class or showed up to events as a pair. It was irritating, and to the both of you, absolutely ridiculous. After all, you saw each other more like siblings than anything romantic.

What was worse were the jokes from your parents, who found endless amusement in imagining a future where the two childhood best friends would “realize their love” and live happily ever after. “Just wait,” Si-eun’s mother would say with a wink, “You’ll end up marrying each other someday.” Your mom would nod and add, “It’s always the childhood friend.” Each time, you two would roll your eyes, exchange looks of mutual horror, and vow—once again—that nothing like that would ever happen. Of course, life has a funny way of turning promises like that into something far more complicated.

Elementary school was the same as early childhood. You two would protect each other from bullies, play on the playground together, sit at lunch together, and walk home together. Kids would see you guys around and point, saying "Everyone says they are boyfriend and girlfriend." and each time you heard that, you'd cover si-eun's ears as you tell them off for spreading rumors. It never bothered him, though, nothing did.

Through middle school, your bond only deepened. you stuck together like glue, shielding each other from the older kids who tried to pick on either one of you, and offering quiet solidarity when either of you had a bad day. You still sat side by side at lunch, signed up for the same electives, and rode the same bus home, where you'd part ways at the driveways with a wave or a sarcastic remark. Of course dating never crossed into your lives—not because you weren’t curious, but because every crush ended up assuming you were already off the market. "Aren’t you with him?" or “Isn’t she your girlfriend?” were questions heard so often, you eventually stopped trying. It wasn’t worth the trouble. At least, not then.

By the time high school rolled around, you found yourselves in fewer classes together, schedules pulling each other in different academic directions. You still clung to the one constant you both had—lunch. It was a sacred part of the day, that small window of time where the chaos of high school could fade away, and you could just be yourselves.

As you both entered senior year, the connection evolved into something quieter but more intense. You skipped classes like a synchronized routine, sometimes ditching school altogether to explore the city or just sit around doing nothing. The friendship became a world of its own—too familiar to question, too easy to fall into. Both of your eighteenth birthdays rolled around, celebrated with family and each other. On weekends, you each rotated between your house and his, lounging around like it was second nature. The teasing never stopped, not from the parents or the few neighborhood kids who hadn’t moved away. But somewhere between all the jokes and assumptions, things began to shift. This time, neither of you was rolling your eyes.

Si-eun had always been reserved, almost unreadable to most people—but to him, you were an open book written in a language only he could understand. He trusted you with parts of himself he wouldn’t even acknowledge aloud. you were beautiful in a way that felt unreal—quiet, grounded, and gentle, the kind of person who he could sit in silence for hours with and you would still make him feel heard. To you, he was a rare kind of boy—sharp-witted, oddly thoughtful, and never once afraid to be silent. He made the world make sense. So when your sixteenth friendship anniversary landed on a weekend where his parents happened to be out of town, and you casually invited yourself over to spend the night, it didn’t feel strange.

⋅•⋅⊰∙∘☽༓☾∘∙⊱⋅•⋅

"I'm so glad to finally get a turn eating all your food, my house is almost empty," you sighed as you flopped down onto his couch. The cushions sank beneath you, familiar and worn in from the years you'd spent hanging out here—watching movies, doing homework, or just sitting in comfortable silence. Si-eun cleared his throat from the kitchen, where he was rummaging through the fridge, the sound of bottles clinking and the hum of the appliance filling the space.

"You've eaten half my pantry," he called back. He returned with a couple of drinks and dropped onto the couch beside you, close enough that your knees brushed. The glow from the TV cast flickering light over the room, but neither of you were really paying attention to it. There was a charged stillness between you, the kind that had been building for weeks, maybe longer—something unspoken shifting in the way your glances lingered and how your laughter had gotten just a bit softer.

You looked over at him, your gaze meeting his, and for once, neither of you looked away. The air grew heavy. His hand rested near yours on the couch cushion, just barely brushing your fingers. "You know," you murmured, heart pounding a little faster, "this is the part where one of our parents would come in and say, 'See? Told you two you were meant for each other.'" Si-eun gave a soft, breathless laugh, but he didn’t move away. Instead, he leaned in slowly, eyes searching yours for hesitation. When your lips finally met, it was cautious at first—tentative, testing the weight of years of friendship and all the closeness that had come before. But once that boundary broke, everything rushed in at once. The kiss deepened, hungry and heated, hands moving with urgency, mouths meeting again and again like you'd been holding back forever. The room, the years, the world—all faded beneath the pull of each other.

You sat up, throwing your leg over his lap and straddling him. His arms hesitated, finding their way to the curve of your waist. You turned your head to the side, deepening the kiss. Your arms rested on his shoulders and your hands found their way into his hair, pulling softly. He barely had time to think before he was standing up, wrapping your legs around his waist and carrying you to his bedroom through the kiss.

You pulled away, falling back onto his mattress. He climbed on top of you, face digging into your neck as he left hickeys. He found your sensitive spot, and you sigh deep into his neck, hands finding their way into his hair once more.

"Are we gonna?—" He breathed out

"—If you talk I think I'll snap back into reality. just do it."

And so he does.

⋅•⋅⊰∙∘☽༓☾∘∙⊱⋅•⋅

You lay there, heavy breaths and moving chests.The room was quiet now, save for the soft hum of the TV still playing in the background and the slow rhythm of your breaths. You lay beneath the blankets, the weight of what just happened settling around you like a thick, electric silence. Neither of you spoke at first—not out of discomfort, but out of awe, maybe disbelief, at how something that once seemed impossible now felt right.

“I can’t believe that just happened,” you said softly, turning your head to glance at him. Your voice wasn’t nervous or unsure—just honest.

Si-eun let out a sigh low and breathy. “Yeah.” He looked at you then, serious for a moment. “I think....part of me’s been waiting for that for a long time.”

You blinked, surprised by the confession—but not in a bad way. It was like something inside you clicked into place. Having such an intimate moment with the only boy you could trust for the past sixteen years of your life made you feel as though it was destiny you had invited yourself over tonight. “So... does this mean that everyone was right?” you asked, half-teasing, half-afraid of the answer.

He smiled, that small, rare smile he only gave you when no one else was around. “I think so.”

You nodded slowly, heart thudding in a new kind of rhythm. “If that’s true, I’m okay with it. I think I want it to be true.”

Si-eun wrapped his arm around you, pulling you a little closer. “Then let’s stop pretending it’s not."

And just like that, years of denying, joking, and brushing off the idea dissolved into something simple and certain. For once, everyone else might have actually been right.

A/N: I'm really proud of this I hope you guys like it.

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