Honkai Star: Rail x Reader Oneshots

'Cause I'm a jealous, jealous, jealous boy | Part 1

How do they react when someone flirts with their significant other?

Warnings: Mild possessiveness, subtle manipulation, slight intimidation, jealousy, dark themes, possible emotional manipulation, Jealousy, Possessive Behavior, Protective, Flirting, Dark Undertones, Romantic Tension.

Sunday

Sunday's golden eyes narrowed slightly as he noticed the unwanted attention being directed at you. He observed for a moment, his dignified demeanor never faltering. However, the subtle tightening of his jaw betrayed a deeper emotion simmering beneath the surface.

With graceful steps, he approached, his halo casting a faint glow behind his head as he effortlessly inserted himself into the conversation. His hand rested lightly on your shoulder, fingers cold yet reassuring. "I see you've caught the attention of someone who doesn't understand boundaries," he said, voice dripping with a twisted kindness. The flirtatious individual faltered under his gaze, the intensity of his golden eyes-sharp and knowing-dismantling any sense of power they might have held.

"Allow me to guide you somewhere... more peaceful." Sunday murmured to you, leading you away. His grip, though gentle, carried an unmistakable possessiveness. His twisted desire to shield you from discomfort played out in his actions-control, protection, and escape from the harshness of such interactions.

Yet behind the composed facade, there was a flicker of possessive jealousy-he would never admit it openly, but the notion of anyone causing you discomfort stirred a dark satisfaction in ensuring they never approached you again.

Dr. Veritas Ratio

Dr. Ratio's gaze flickered toward the scene, noting the discomfort painted across your features as the unwanted attention continued. His lips curled into a smirk, an amused scoff escaping him as he closed the distance between you and the offender. The sheer confidence in his posture made his presence impossible to ignore.

"You seem... intellectually challenged," Ratio remarked bluntly to the flirt, his eyes gleaming with a mixture of amusement and condescension. "You see, my partner isn't interested in primitive gestures of attraction. They prefer stimulating conversation, something you appear incapable of providing."

He wrapped an arm around your waist, pulling you close with an air of smug satisfaction. "Allow me to demonstrate what true compatibility looks like." His words, though cutting toward the flirt, were meant to reassure you. Ratio didn't bother hiding the possessive undercurrent in his tone.

In his mind, you were already his equal, intellectually and emotionally, and there was no room for such trivial distractions. His jealousy manifested not in anger, but in a pointed display of superiority, ensuring no one would dare challenge his place beside you.

Aventurine

Aventurine watches the flirtation unfold from across the room, his smile still present but with a hint of something darker behind it. His magenta and cyan eyes flicker with amusement, though his gaze lingers on your discomfort for a moment too long. Slowly, he saunters over, his every step deliberate, like a high-stakes poker player revealing a winning hand.

"My, my," he begins, slipping an arm around your waist as he pulls you close. The flirt freezes under his penetrating stare. "It seems you've miscalculated," he says, his tone smooth as velvet, yet there's a razor-sharp edge beneath the surface. "You see, this one belongs to me."

Aventurine lets the words hang, watching the flirter with a grin that doesn't reach his eyes. His fingers play absentmindedly with one of his golden rings, the subtle gesture adding to the tension. "And I don't share my investments."

The flirter takes a step back, realizing they've lost this particular gamble, and mutters an apology before disappearing. Aventurine chuckles softly, turning to you with a playful smirk.

"Honestly, darling," he says, adjusting the collar of his overcoat, "the nerve of some people, thinking they can play a hand they've already lost." His eyes gleam mischievously as he leans in closer, whispering, "Don't worry, I've got you covered. No one dares touch what's mine."

There's a flicker of possessiveness in his tone, subtle but unmistakable, as though you were a precious prize he wouldn't let anyone else even attempt to claim. Though his demeanor is playful, you sense the jealousy simmering beneath his charm, a silent reminder that in Aventurine's world, risks are calculated, and he never gambles on what he's already won.