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crystal-kiri · 7 months ago

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okay you said you like angst so a ominis x mc x sebastian where she ends up breaking down because to pick one would be to hurt the other and neither deserves that. they both have been through so much

An Impossible Choice | Sebastian x Reader x Ominis

UGH okay this was TOUGH, so many directions I could have taken this, but I think it turned out good (and angsty ahah) enjoy!!

Words: ~2,800

Tags: Reader Insert, Female MC, No Y/N, Angst, Emotional Turmoil, Hurt/No Comfort

You never expected to find yourself here—trapped between two people who mean the world to you, each step forward feeling like a betrayal of the other. But lately, that’s all your friendship with Sebastian and Ominis has felt like: a careful balancing act, an impossible equation with no solution.

The three of you have been inseparable since fifth year, bound by shared secrets, whispered laughter in candlelit corridors, and the safety of knowing that, no matter what, you’d always have each other. But something changed. And you don’t know when, or how, or why, only that the weight of it presses down on you like a vice, squeezing the air from your lungs.

It’s in the way Sebastian’s gaze lingers too long when you speak, as if memorizing the shape of your lips. It’s in the way Ominis’s voice softens when he says your name, something reverent and unspoken curling around the syllables. It’s in the sharpness of Sebastian’s posture whenever Ominis leans too close, the flicker of something dangerous in his brown eyes. And it’s in the way Ominis stiffens when Sebastian’s hand brushes yours, his grip tightening on his wand like it’s the only thing keeping him grounded.

Neither of them has said anything outright, but they don’t have to. You feel it in every stolen glance, every tense silence. And the worst part is, you love them both.

Not in the way a friend loves, but in the way that keeps you up at night, staring at the ceiling, your heart aching with the knowledge that no matter what you do, someone is going to get hurt.

So you try to ignore it.

You pretend that everything is fine, that nothing has changed, even as the moments between you grow heavier, thick with things unsaid. But ignoring it doesn’t stop the way your stomach knots whenever Sebastian throws an arm around your shoulders, his touch possessive in a way that makes your skin burn. It doesn’t stop the way your breath catches when Ominis murmurs your name, tilting his head toward you as if you’re the only thing in the world worth listening to. It doesn’t stop the guilt that coils inside you like a living thing, twisting and writhing every time you laugh too easily with one of them while the other watches in silence.

You tell yourself it will pass—that they’ll move on, that you’ll somehow find your way back to the friendship you once had. But deep down, you know better.

Because you can feel it. The tension, the inevitable breaking point, pressing against your ribs like a warning as you sit between them, a book open on your lap. You haven’t turned a page in ages—not with the way Sebastian and Ominis keep shifting, the air between them drawn tight as a bowstring, poised to snap.

They’ve been like this all night. Every glance between them is sharp-edged, every word that passes their lips too carefully measured. It’s not a fight. Not yet. But it’s something close, something simmering just beneath the surface, waiting for the wrong word, the wrong move, to send it all spilling over.

You pretend not to notice. You keep your eyes on the book, fingers gripping the pages a little too tightly. If you acknowledge it, if you so much as breathe wrong, everything will collapse.

Then Sebastian shifts beside you, leaning in, his arm brushing yours as he points at a passage in the book.

“You’ve been staring at the same page for minutes,” he murmurs, voice low, amused. “Need me to read it for you?”

You barely have time to react before Ominis snaps.

“Do you ever give her any space?”

The words lash through the air, cold and cutting. Sebastian stills, his expression darkening as he turns to face Ominis.

“What’s your problem?”

“My problem?” Ominis lets out a humorless laugh, standing to his full height. “Is you, Sebastian. You can’t go five bloody minutes without draping yourself over her like she belongs to you.”

Sebastian’s jaw clenches. “And you can’t go two bloody minutes without acting like you know what’s best for her.”

Ominis scoffs. “Someone has to.”

It’s spiraling too fast. You sit up straighter, reaching out. “Can we not—”

“Maybe if you weren’t so busy hovering, you’d realize she doesn’t need you to control everything she does,” Sebastian bites out, ignoring you entirely.

“Oh, that’s rich,” Ominis sneers as he gets to his feet. “Coming from you. The man who never knows when to stop.”

Sebastian’s hands curl into fists. “You want to say that again?”

“I’d love to.” Ominis tilts his head, voice sharp as glass. “You’ve always been selfish, Sebastian. Always taking, never thinking. And now you can’t stand the idea that you might not be the only one she cares about.”

Sebastian rises, and for a moment, you think he might actually swing at Ominis. You shove yourself up between them, pressing a hand to each of their chests.

“Enough,” you say, breathless, desperate. “Both of you. Just—stop.”

But neither of them are looking at you. They’re locked onto each other, eyes burning with something raw, something ugly, something that has been coming for a long time, creeping in at the edges of their friendship, poisoning it from the inside out.

And you? You’re the catalyst. The excuse they need to finally let it all unravel.

The thought makes you sick.

“You really think you’re the better man, Ominis? That you’re any less selfish?” Sebastian laughs. “At least I don’t hide behind self-righteous bullshit and pretend I don’t want her.”

Ominis' expression flickers—just for a second—but the crack is there, sharp as a splinter. His lips part, then press into a thin line as if he’s forcing something down, something dangerous. When he speaks, his voice is quieter now, but no less venomous.

“And yet, you act as though she’s already yours.” His head tilts, eerily precise. “Like you have some unspoken claim on her.”

Sebastian’s laughter is sharp, humorless. “Oh, I’m sorry—am I supposed to sit back and watch while you play the noble, brooding protector? While you pretend you aren’t thinking the same damn things I am?” He steps closer, pressing up against your hand. “At least I’m honest about it.”

“This isn’t a competition,” you snap, your voice cutting through the rising tension. “I’m not—”

But Ominis speaks over you, his voice razor-sharp. “Honest?” He laughs, a brittle, scathing sound. “You think she doesn’t see through you, Sebastian? That she doesn’t know how you manipulate everyone around you when you don’t get your way?”

Sebastian’s eyes darken. “And what about you? Hm? You stand there, acting like you have some moral high ground, pretending you’re her protector, her friend—but you’re nothing more than a coward. At least I have the nerve to fight for what I want.”

Ominis’ lips curl, but there’s something restrained in his stance, something barely held back. His next words come slow, deliberate. “No, Sebastian. You don’t fight for what you want. You take. You push. And you never think about the consequences.”

Sebastian scoffs, stepping even closer, his breath warm against your skin as he looms just inches from Ominis now. “You’re so full of shit.”

Ominis doesn’t flinch, but you feel it—the way his fingers twitch at his sides, the way his throat bobs, the sharp intake of breath like he’s fighting to hold something down.

“Tell me,” Ominis says suddenly, turning toward you. His voice isn’t cruel, but it’s raw, pained. “Are you just going to stand there and

let him decide everything for you? Let him pull you into whatever game he’s playing?” His head tilts, the weight of his words pressing into you, sharp and insistent. “Or do you have something to say?”

Sebastian’s hand twitches at his side. “Don’t put this on her.”

“I’m not putting anything on her,” Ominis counters, voice low, controlled—but there’s something beneath it, something breaking. “I’m giving her the chance to speak for herself. Which is more than you’ve ever done.”

The air is thick with tension, suffocating. Your heart pounds against your ribs, loud enough that you swear they must hear it, too. Your mouth feels dry, your fingers curled into fists at your sides as their gazes burn into you from both angles.

And the truth is—you don’t know what to say.

Because every word you could give them feels like a betrayal to one of them. Every choice, every step, every breath feels like tipping the scales in a way you can’t undo.

Sebastian’s eyes are locked onto yours now, something desperate, something pleading flickering behind the frustration in his gaze. “Just tell him,” he murmurs, voice softer now, edged with something dangerously close to vulnerability. “Tell him that you—”

“Don’t,” Ominis interrupts, and his expression is unreadable, his hands trembling just slightly at his sides. “Don’t try to put words in her mouth.”

You shake your head, feeling the weight of both of them, the history, the heartbreak that you haven’t even let yourself acknowledge until now. This is it. The moment where everything shatters.

“I can’t,” you whisper.

It’s barely a sound, but it’s enough.

Sebastian’s face falls, just slightly, just enough for you to see the hurt flash through his features before he masks it behind a clenched jaw. Ominis exhales sharply, sounding almost relieved, before he schools his expression into something carefully composed. His shoulders loosen, and there’s the briefest flicker of something in his posture—hope, maybe, or something close to it.

Before you can speak, Sebastian brushes past you, his hand shooting out to grip the front of Ominis’s shirt.

“Don’t look so fucking smug,” Sebastian snaps, his voice low and dangerous. “She hasn’t said anything yet.”

Ominis doesn’t flinch. He stands his ground, lips pressed together in a thin, unreadable line. His hands remain at his sides, but you see the faintest tremor in his fingers. His voice, however, is steady when he replies.

“Does it scare you, Sebastian?” he murmurs, his head tilting just slightly. “The idea that, maybe, for once, you’re not the only one who matters?”

Sebastian’s grip tightens on Ominis’s shirt, and for a moment, neither of them moves. The air is taut, stretched thin like a wire about to snap. Ominis is taller, his presence sharp and imposing, but Sebastian is the one with strength on his side, his stance coiled tight like a drawn bowstring.

“Say that again,” Sebastian growls, his voice dropping even lower, roughened by barely restrained fury.

Ominis doesn’t hesitate. “You heard me.”

And then, to your horror, Ominis reaches for Sebastian’s shirt in return. His fingers, slender but firm, curl into the fabric, mirroring the grip Sebastian has on him. It’s not quite a shove, but the tension between them spikes, raw and volatile. Your breath catches, panic clawing at your chest.

“Ominis,” you breathe, stepping forward, but neither of them acknowledges you.

Sebastian’s fingers flex against Ominis’s collar, his jaw locked tight. “You think this is about me?” he spits. “You think I don’t care what she wants?”

“Do you?” Ominis presses. His grip tightens. “Because all I’ve ever seen you do is pull and pull and pull until she’s too caught up in your orbit to break free.”

Sebastian’s whole body goes rigid, like Ominis just landed a direct hit where it hurts most. You see it in his expression—that flicker of something deep and wounded before it twists into anger.

“She’s not yours to defend, Ominis,” Sebastian bites out, voice shaking with barely contained frustration. “And she’s sure as hell not yours to decide for.”

“And yet, here you are,” Ominis returns, unyielding. “Acting like the only person who gets to have a say is you.”

The muscles in Sebastian’s arms flex, his fingers trembling against the fabric of Ominis’s shirt, as though he’s on the verge of pushing, of shoving, of—

“Stop it!”

Your voice cuts through the space between them, raw and desperate.

They freeze.

The silence that follows is deafening.

You take a step back, breath shuddering, hands curling into fists at your sides. You feel the heat rising up your throat, the sharp sting of frustration prickling behind your eyes.

"You—" Your voice shakes with something raw, something close to fury. "Do either of you even hear yourselves right now?"

Sebastian's gaze snaps to you, still burning with frustration, but something else flickers beneath it—something hesitant.

Ominis’s lips part slightly, as if he wants to say something, but he doesn't.

"You’re both acting like children," you spit, your voice rising. "Like this is some petty fight over who gets the last fucking piece of cake instead of a real, human person standing right in front of you!"

Sebastian tenses. "That’s not—"

"Don’t," you snap, cutting him off, chest heaving. "Don’t you dare try telling me this isn’t exactly what it looks like. Like I haven’t just stood here and listened to you two rip each other apart over me."

You shake your head, anger curling hot in your chest, almost unbearable. "Neither of you are fucking listening. Neither of you are stopping for one second to actually ask me what I want. You’re both just deciding, making assumptions, thinking you know what’s best, thinking you have any right to—"

Your voice catches, but you don’t stop. You can’t.

"Did it ever occur to you—either of you—that if you wanted to know how I felt, you could have just asked?! And if you had, then you'd know—" You let out a sharp, bitter laugh, shaking your head. "You'd know I can't choose!"

The words hang heavy in the air, and you feel the weight of them settle into the space between you. You don't even know if you mean won’t or can’t. You just know it’s the truth, and you want them to hear it, to feel it, to finally understand the weight they’ve been forcing you to carry.

Sebastian’s mouth opens, but you cut him off before he can even start.

"Because if you had asked," Your voice wavers, and you hate it, hate the way your throat tightens, the way tears burn at the edges of your vision. "You’d know that every time I’m with one of you, I feel like I’m hurting the other. That my heart is breaking constantly because I see it, I see the way it destroys you both. And I don’t know how to fix it."

Your breath is unsteady, fists clenching at your sides. "You think this is easy for me? That I like feeling like I’m being torn in two? Like no matter what I do, I’m going to end up hurting someone I love?"

You shake your head, feeling heat creep up your neck, anger and grief colliding in a whirlwind you can’t stop. "I am so tired. Tired of feeling guilty just for existing in the space between you. Tired of knowing that no matter what I do, I’ll never be enough for either of you because you both want me to be something I can’t be!"

The silence is suffocating, but you don’t stop.

"You think he pulls me into his orbit?" you snap at Ominis, eyes blazing. "Then what the hell do you think you do? You sit there, self-righteous and brooding, waiting for me to prove something to you, like I have to earn your permission to exist between the two of you!"

Ominis swallows hard, and for finally, his composure cracks.

"And you," you turn on Sebastian, breathing hard. "You think he’s the only one who makes decisions for me? You do it all the time. You assume what I want, what I need, what I’m thinking, and you don’t even ask before making a choice for me!"

Sebastian’s expression shatters, his hands flexing like he wants to reach for you, but he doesn’t. He doesn’t dare.

You take a step back, throat thick with everything you’ve held inside for too long. "You both act like you know what’s best for me. But you never once stopped to listen—to really listen—to me."

The words hang heavy between you, and in their silence, you finally hear it. The sound of your own breaking heart.

You exhale shakily, swallowing hard before whispering, "I love you both."

Sebastian lets out a quiet, almost pained breath. Ominis turns his face slightly away, as if the words physically struck him.

"And I hate it," you continue, voice barely above a whisper. "I hate that it’s not enough. That no matter how much I love you both, it's destined to end like this. With fighting. With pain. With one of you walking away while the other pretends they’ve won something."

A pause. A silence so thick it almost drowns you.

And then you take another step back.

"I can’t do this anymore."

Sebastian inhales sharply. Ominis’s hands twitch.

You shake your head one last time, voice hoarse, empty. "If you really cared about me, you wouldn’t put me in this position at all."

With that, you turn and walk away.

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