Honkai Star: Rail x Reader Oneshots

The Best Investment | Dad!Aventurine x Mom!(Fem!)Reader

Summary: In a cozy evening at home, you and Aventurine enjoy a quiet moment with your teenage daughter, Airi, who has inherited her father's cleverness and curiosity. Aventurine listens attentively as Airi discusses her school project, showing a side of patience and warmth he reserves only for family. After she leaves, he reflects on the life you've both built, sharing a quiet, proud moment with you.

Tags: Dad! Aventurine x Mom(Female)!Reader, Family fluff, Domestic life, Soft Aventurine, Parent-child bond, Intimate romance, Warmth and Affection.

Warnings: Mild Romantic Intimacy, daughter is named Airi but you can change it to your liking.

In the quiet ambiance of your home, you sit in the living room, cozy in a thick blanket as you watch your teenage daughter, Airi, animatedly explain her latest school project to Aventurine. He leans back in his seat, an indulgent smile playing on his lips, his vibrant magenta and cyan eyes catching every gesture and word. He may be a brilliant strategist and a high-stakes risk-taker, but when it comes to Airi, he's always attentive, supportive, and-most of all-patient.

She has his cleverness, that spark of curiosity mixed with a touch of rebelliousness, and you've often laughed, whispering that Airi is indeed her father's daughter. You still remember his stunned expression when you first shared the news of your pregnancy, followed by the fierce determination in his eyes as he promised he'd always be there for you both. It was a vulnerable side of Aventurine few ever saw, but one that you cherish.

"Dad," Airi says, holding up a small drawing she made for her project. "I'm going to need supplies, maybe some paints. Could we go to the art shop together?"

Aventurine's eyes soften as he looks at her. "Of course, but I expect you to use those paints wisely," he teases, raising a playful brow. "Art is an investment, after all."

"Right." she smirks, clearly used to his way of making everything a metaphor for investment and strategy. You chuckle, shaking your head, as Airi rolls her eyes, but both of them share a little smile.

After a while, as she heads off to her room, Aventurine leans back on the sofa beside you, slipping an arm around your shoulders and pulling you close. "We've done well, haven't we?" he murmurs, his voice laced with pride and warmth.

You smile, resting your head on his shoulder. "She's amazing. And she gets a lot of that from you." you reply, giving his hand a gentle squeeze. He chuckles softly, almost as if he doesn't quite believe it, but the way he watches Airi's bedroom door confirms he's aware of just how deeply she's impacted his life.

He shifts, turning to face you, that familiar smile playing on his lips. "I think the best investments I've made are in this family." he admits quietly. In these moments, there's no need for his elaborate words or his showy charm; it's just you, him, and the life you've built together.

There's something magical in that simplicity-a warmth that envelops you, solid and steady like the foundation he's helped create.

As Aventurine's hand slips down to rest at your waist, he leans closer, his voice dropping to a lower, softer tone. "Though... I can think of a few investments that deserve a bit more attention," he murmurs, his warm breath brushing against your ear.

A playful glint appears in his eyes, and his fingers lightly trace circles against your hip, igniting a spark in the small, quiet space between you. The look he gives you is full of unspoken promises, his usual confidence simmering into something a touch more intimate.

You raise an eyebrow, teasing back, "Shouldn't you be planning Airi's little art outing?"

"A perfectly good reason to call it an early night," he replies smoothly, the corners of his lips turning up as he pulls you closer, his thumb brushing your jawline. "Besides, we've still got time before she even thinks about going to bed."

His words linger, and the atmosphere between you both shifts, the ordinary evening melting into a private, stolen moment. His eyes catch yours, and without another word, he closes the distance, his kiss slow and lingering, as if savoring every second.

And for a moment, it's just the two of you, your world quiet and close, wrapped up in that shared warmth as his touch grows bolder.