Chapter Text
Disclaimer
Itsu no Hi ka is an independent work of fanfiction.
The principal characters, settings, and concepts from Magical Girl Lyrical Nanoha were originally created by Masaki Tsuzuki and remain the property of Seven Arcs, King Records, and their respective rights holders. The crossover elements and characters Kyosuke Kasuga, Madoka Ayukawa, and Hikaru Hiyama originate from Kimagure Orange Road by Izumi Matsumoto.
This story is a non-commercial, transformative creation produced solely for entertainment and artistic expression within the fan community. No copyright infringement is intended, and no monetary profit is derived from its publication.
Itsu no Hi ka takes place within the broader continuity of the Beyond The Aurora saga, specifically during the Quiet Custodian Era. It serves as a side-story vignette set shortly after Fate Testarossa’s return from her own mission.
The narrative follows Hayate Yagami as she embarks on an assignment with Reinforce Eins and Vita to a 1980s town. There, her golden “Goldia” ring resonates with the lingering emotions of a teenage love triangle, compelling the eternal trio to confront the origins of love and the boundless, harmonious sky shared by their family.
Character relationships (including the central polycule), the “Goldia” ring, the “Empath’s Stone” Lost Logia, and the expanded interpretations of magical and psychic phenomena are original creative developments unique to this fan-made continuity and are not part of official canon.
All original story concepts and thematic explorations within Itsu no Hi ka are the author’s own, written to explore the emotional and philosophical dimensions of love, memory, and connection.
Thank you sincerely for reading and supporting this work.
Andō Masaki
OP Theme Song:
NIGHT OF SUMMER SIDE (Performed By: Masanori Ikeda)
ED Theme Song:
Hold on to That Sky (Performed By: Kanako Wada)
The first thing Hayate noticed was the light.
It wasn’t the crystalline brilliance of Mid-Childa’s skyways or the sterile, white geometry of a TSAB operations hall. This light felt alive—soft and slow, with the diffuse, honeyed glow of a sun sinking toward the horizon. It filtered through a thin veil of dust and humidity, turning the air into liquid gold.
When it touched her skin, it wasn’t just light anymore. It was warmth—gentle, human warmth—something she could feel rather than simply register. It sank in quietly, as if reminding her that this world belonged to seasons, to weather, to breath.
Their teleportation flare faded behind her, not into the familiar containment shimmer of magical transfer, but into a slow cascade of luminous motes that drifted away like dandelion seeds. A breeze caught them, carrying the scent of damp soil after rain, the sweetness of hydrangeas in bloom, and—faint but distinct—the comforting aroma of curry simmering somewhere nearby.
For a moment, she simply stood there, allowing her senses to take it all in—the warmth that clung to her skin, the living air that moved around her, and the distant, steady hum of ordinary life.
This was a world that breathed—slowly, quietly, with purpose.
And without meaning to, Hayate began to breathe in rhythm with the world around her.
She drew in a deep breath, tasting the faint sweetness of the air, the traces of earth and flowers mingling in it. “It’s different, isn’t it?” she said softly, her voice carrying that natural warmth she never quite lost, the gentle lilt of her Kansai speech weaving through the words. “The air here feels… alive somehow.”
They stood at the edge of a small neighbourhood park—modest and unassuming, resting quietly between rows of houses. It was a patch of green that seemed to have slipped out of time, its history etched in the rusted sway of a swing set, the sun-bleached boards of a weathered bench, and a sandbox softened by the echoes of long-faded laughter. It wasn’t neglected, only settled—a place content in its simplicity, moving to the gentle, unhurried rhythm of ordinary days.
“Coordinates confirmed,” Reinforce Eins reported, her voice a calm, measured murmur that seemed to blend seamlessly with the stillness around them. She stood perfectly still, the image of quiet precision, her long silver hair falling like liquid moonlight down her back. Her scarlet eyes did not merely see—they assessed, calculated, and recorded, absorbing every detail with unhurried exactness. “Arrival point verified. Designated non-administered world, local calendar year 1986. Atmospheric composition within safe limits, ambient mana levels negligible.”
“So this is the place, huh?” Vita muttered, planting her hands on her hips as her thick orange braids swung in time with her restless movements. She kicked idly at the packed earth, scattering a few loose pebbles. “Looks… sleepy.”
Hayate’s smile deepened, gentle yet perceptive. Her sapphire eyes missed nothing—the boxy outline of an old car rumbling down a distant street, the modest sway of laundry on a clothesline, the neat collar of a teenager’s blouse buttoned up against the afternoon heat. Each small detail was a brushstroke in a larger picture, a mosaic of time and place she was already beginning to understand.
On her right hand, a simple golden band caught the light—a faint, steady gleam, like a fragment of sunlight held within the metal. The Goldia ring reflected her quiet balance, a private center of gravity amid the subtler currents of their work. “A sleepy town, Vita. That’s the idea,” she said with an easy, knowing tone. “No dimensional quakes, no rogue mages—just a Lost Logia making a bit of emotional noise. This one calls for a gentle hand, not a hammer, na.”
The briefing had been clear in its uncertainty. The artefact—classified as the Empath’s Stone—had slipped through a dimensional rift and embedded itself here. Its influence was quiet, but far-reaching. It didn’t overwhelm; it seeped. It amplified the emotions already present in people’s hearts, turning unspoken frustrations and lingering grief into something deeper, heavier—an emotional fever that spread without sound or light. To an untrained world, its presence would appear only as whispers of the strange: a fog that lingered too long, the shimmer of light bending where it shouldn’t, a rising tension that no one could name. And all of it pointed here—to this neighbourhood, to this calm, sunlit corner of an unsuspecting world.
[Connection to the Eternal Homefront is stable and clear,] came Nanoha’s voice through the mental link—bright, steady, and unmistakably warm, like sunlight filtering through glass. [We’re reading you loud and clear. Relay is holding perfectly.]
[Thanks, Nanoha-chan,] Hayate replied, a quiet smile curving her lips at the familiar comfort in that tone. [It is peaceful here… almost too peaceful. We’ll get settled and begin the preliminary check. Tell everyone we said hello.]
[Understood. Stay careful, all of you,] Fate’s voice followed—precise and cool, polished like tempered silver, yet carrying that subtle note of concern she never quite hid. [Without magical infrastructure, you’re operating independently. The cultural context may present… certain challenges.]
[We’re not kids, Fate,] Vita grumbled across the link, more habit than protest. [Simple job—grab the rock, bag it, and get back before you and Einhard finish setting the table.]
[We will maintain optimal operational discipline, Vita,] Eins replied, tone composed and even, like a measured breath. [Current threat assessment remains low, though social variables are still indeterminate.]
Hayate felt a quiet steadiness in the chorus of familiar presences, warmth that threaded through her mind and steadied her steps. It was the anchor she needed to move with calm through the subtle emotional currents of this town. Nanoha was the brilliant sun, bright and unwavering; Fate the steady moon, cool and sure; Vivio and Einhard like distant stars, flickering with quiet reassurance; Ave, the solid earth beneath her feet, grounding and constant. Together, they formed a constellation she could navigate by, even in unknown skies.
Their cover story was simple: distant relatives visiting for a short stay. Vita and Eins were chosen with care. Vita’s directness could cut through polite façades, unearthing truths others might hide beneath layers of social custom. Eins, silent, precise, and endlessly observant, could track emotional undercurrents, environmental cues, and psionic disturbances simultaneously—an invaluable presence in a place where subtlety would be the key to success.
“Let’s find our lodgings,” Hayate said, stepping forward with the quiet confidence of someone who carried responsibility without need of display. Her sundress fluttered in the gentle afternoon breeze, and she inhaled the mingling scents of sun-warmed grass, distant laundry, and a hint of cooking drifting from a nearby house. “We’ll take the scenic route. The Kasuga residence is that way. Scans show the strongest psychic fluctuations coming from there. I want to understand the area before we make contact.”
The town moved around them at its own unhurried pace: a bicycle bell rang faintly down a distant street, a neighbour called out to someone over a fence, and the sunlight painted shifting patterns across roof tiles and pavement. Every detail—the rustle of leaves, the hum of quiet activity, even the heat of the late afternoon sun—layered itself into the fabric of the mission, turning an ordinary walk into a study in living, breathing normalcy. And Hayate moved through it, attuned to each pulse and rhythm, carrying the weight of her team’s purpose lightly, as though the town’s calm might absorb it all.
The neighbourhood moved with a rhythm all its own, a subtle heartbeat that Hayate sensed more than she heard. Each step along the narrow streets carried the weight of countless small lives unfolding: the scrape of shoes over gravel, the gentle sway of leaves in the breeze, the soft clatter of shutters shifting on their hinges. It was a world apart from Cranagan’s gleaming corridors, apart from the disciplined hum of TSAB technology. Here, life spread slowly, deliberately, like ink blooming across water—alive, unhurried, and tangible.
Beneath the calm, something restless pulsed. It was untamed, unshaped—a vibration that belonged neither to the steady rhythm of magic nor the precise hum of a Device. It was pure emotion, seeping into the air like paint spreading across a blank canvas. Hayate’s Goldia ring hummed with gentle warmth against her skin, and for a fleeting instant, it felt as though she were touching another heartbeat—far away, yet achingly close.
“Eins,” Hayate murmured, her voice barely above a whisper, a subtle tremor betraying her unease. “Do you feel that too?”
Eins’ scarlet eyes scanned the street with unwavering precision, cold and methodical. “Elevated psionic wavelengths detected,” she reported, her voice quiet yet unshakable. “Origin appears biological and highly chaotic. Fluctuations suggest alternating peaks of extreme excitement and profound anxiety. Correlation with an Empath’s Stone: ninety-six point seven percent.”
Hayate followed Eins’ gaze to a modest, two-story house ahead, its whitewashed walls dappled with shade from a sprawling leafy tree. And then, with a sudden, clattering motion, the front door flew open—and the first wave of emotional energy struck her like a physical force.
A boy stumbled onto the porch, hair tousled and wild, and his face a whirlwind of panic. Every flailing motion seemed magnified, stretched across the still morning like a frame frozen in midair. Shoes skidded, arms flailed, and for a fleeting heartbeat, Hayate felt as though the street itself had condensed into him, radiating jagged, trembling arcs of energy.
Vita muttered something sharp under her breath, but Hayate barely registered it. Her attention had already shifted to the other figure: Kyosuke’s friend, steady and composed, a calm anchor against the chaotic storm of Kyosuke’s movements. But Kyosuke wasn’t paying him any mind. His gaze was locked across the street, and Hayate instinctively followed.
There she was.
Madoka Ayukawa. Even at a casual pace, she dominated the space around her, turning the ordinary street into her own stage. Every step, every subtle tilt of her head, seemed deliberate, imbued with an effortless grace. The saxophone case in her hand seemed less an object and more a natural extension, moving in perfect sync with her motions. When their eyes met—dark, unreadable, and piercing—Hayate felt the air shift, thickened with a sudden, almost tangible tension.
It was more than mere attraction. It was raw, unfiltered emotion—a tidal wave of adolescent longing, panic, and fascination that pressed against Hayate’s chest, stole her breath, and sent tingling sparks along her fingertips. Her Goldia ring flared, warmth radiating swiftly up her arm, a sympathetic echo that was almost painful in its intimacy. She could feel his heart hammering, as if it were thrumming inside her own ribcage.
“Targets confirmed,” whispered Eins, her voice sharp and precise, slicing through the emotional turbulence. “Primary subject: Kyosuke Kasuga. Secondary subject: Madoka Ayukawa. Emotional output has surged by three hundred seventy-four percent. Psionic waveform indicates extreme romantic fixation, amplified by acute social anxiety.”
Vita’s scoff sounded distant, irrelevant against the sheer force of the emotional resonance. Hayate’s focus narrowed, every sense attuned to the currents of feeling around her. She knew desperate longing—countless lonely nights confined to a hospital room, counting seconds until someone arrived—but this was something else entirely. Amplified, projected outward, and magnified by a malevolent influence. The Stone was feeding on it, twisting a boy’s private panic into a torrent capable of swallowing him whole.
Kyosuke stumbled forward; cheeks flushed deep crimson, each step a precarious balance of hope and panic. And then she arrived—the third catalyst. Hikaru Hiyama. Her vibrant, cheerful presence collided with Kyosuke’s frazzled state like a bolt of lightning, sending the emotional field around them into violent, writhing motion. Guilt, confusion, desire, fear—they intertwined in jagged, erratic spikes that crackled in Hayate’s perception like electricity dancing across water.
Eins’ voice cut through the haze, precise and clinical, yet even her detachment could not mask the enormity of what was unfolding. “Primary resonance: triple-helix pattern. Kyosuke’s untrained psionic output functions as an amplifier. Both female subjects reflect and reinforce it. The Empath’s Stone is drawing energy from this dynamic, sustaining itself.”
Hayate’s chest tightened with the weight of it. She could feel the pressure reverberate in her own heartbeat, the subtle tremor running through her fingers. It was as if she were standing at the eye of a storm composed entirely of raw emotion, each surge threatening to tear the air apart. The spectrum of human feeling—desperation, longing, hope, fear—was tangible, swirling around her like a living current, and she could sense the delicate line Kyosuke tread between exhilaration and total collapse.
Vita’s voice pierced the tension, sharp and uncompromising. “So basically, he’s a walking emotional bomb, on the verge of exploding—and that rock’s just fuelling the fire.”
“Yes,” Eins replied softly, her tone almost a quiet acknowledgment of Hayate’s unspoken thoughts. “The artefact feeds on this instability. It sustains itself by perpetuating the conditions that empower it.”
Hayate’s fingers curled tightly around the Goldia ring. She couldn’t halt the surge; she couldn’t contain it all—but she could observe it, follow its currents. She could guide it. She could be the anchor in this chaotic, amplified sea of raw emotion. And if the Stone were drawing power from it, she would confront it—before its influence consumed them all.
The street seemed to slow, each movement stretching into deliberate clarity. Kyosuke’s desperate gaze, Madoka’s sharp, fleeting glance, Hikaru’s exuberant intrusion—they were no longer just individuals, but points in a storm of raw, unstable energy. And at the center, Hayate stood, acutely aware of every heartbeat, every pulse, as if the very air around her had become charged with human longing.
Hayate watched the trio vanish around a corner. Their figures swallowed by the quiet suburban streets, yet the psychic echoes of their interaction lingered—subtle, insistent, like the faint tang of ozone after a lightning strike. To any ordinary observer, the street had returned to calm; long shadows stretched across the pavement as the sun dipped toward the horizon. But to her attuned senses, the air still thrummed with tension—a delicate, resonant pulse of emotion threading through the three hearts she had glimpsed. Every sigh, every fleeting gesture, every quiver of uncertainty had left an imprint in that invisible field, and she felt it all, intricate and precise.
Her eyes fell to the Goldia ring on her finger. Its soft golden glow pulsed gently, like a heartbeat, perfectly synchronized with the lingering psychic waves in the street. The ring was not merely reacting—it was resonating, tuning itself to the chaotic, delicate rhythm of lives intertwined with this Stone. In that quiet, Hayate understood with unshakable clarity: this mission was no longer about recovering a Lost Logia. It was about safeguarding fragile lives, protecting hearts as much as the artefact itself.
“The epicentre… it’s not just the house. Not even this town,” she murmured to herself, her voice soft yet steady. Her gaze lingered on the softly glowing ring before drifting to the empty street, thoughtful and sombre. “It’s them. Their hearts. Their story. The Stone hasn’t merely arrived here—it has entwined itself with their lives. If we remove it recklessly… the damage won’t be to the artefact. It will be to them.”
Turning to face Vita and Eins, her sapphire eyes radiated calm determination, warmth tempered with quiet resolve. “We can’t simply storm in, take the artefact, and leave. The emotional backlash alone could… break them. Our first responsibility is to protect them, not just the Stone.”
Vita let out a long, exaggerated sigh, crossing her arms as a grounding, physical counterpoint to the invisible chaos around them. “Fine,” she muttered, voice low and edged with frustration. “More subtlety. Less smashing. But if I have to sit through one more round of sighing, foot-stomping, or melodrama, I can’t promise I won’t clobber something just to feel better.”
Eins’ lips twitched with the faintest of smiles. “A tactical venting of frustration is noted and understood, Vita,” she remarked, her tone dry, yet carrying the slightest warmth beneath the formality.
“We will proceed with a dual-track operational protocol,” Eins continued, her voice precise, calculating the invisible currents around them with measured care. “Track one: locate and monitor the artefact, preparing for retrieval at the most precise, optimal moment. Track two: observe, and where possible, gently stabilize the emotional state of the key subjects. Our goal is to reduce the ambient psychic energy to a level where extraction will not inflict irreparable harm.”
Hayate nodded, letting her gaze sweep across the quiet neighbourhood one final time. In that instant, the mission shifted in her mind. What had begun as a straightforward retrieval had become a delicate orchestration of hearts and connections—a task as much about empathy as strategy. She could feel it—the invisible pulse of lives intertwining, the fragile yet resilient threads of trust, fear, hope, and hesitation.
And as she sensed it—the steady, grounding presence of her family echoing through her mind—she understood why she, of all TSAB officers, had been entrusted with this task. Ave’s quiet strength and unwavering presence anchored her; Nanoha’s warmth reminded her that empathy could be a shield; Fate’s resolute determination showed her the power of steadfastness under uncertainty; Vivio’s cheerful resolve sparked hope; Einhard’s careful attentiveness offered perspective; Hayate’s own courage, reflected back through memories shared with Ave and the others, lent clarity; Vita’s blunt honesty reminded her of courage’s force; Signum’s disciplined vigilance steadied her approach; Shamal’s perceptive insight and gentle guidance offered quiet wisdom; Zafira’s unwavering loyalty and protective nature reinforced her sense of responsibility; Agito’s determined reliability lent steadfast support; and Reinforce Eins and Reinforce Zwei’s precise understanding of emotional currents provided critical guidance.
Together, they were more than a team—they were a living, resonant harmony, a family bound by strength, trust, and care. Each of them was a chord in that resonance, their bonds weaving through one another in subtle, intricate ways, creating a harmony that extended beyond mere camaraderie. And within that harmony was a quieter, deeper connection threading through her awareness: Ave and Nanoha, Fate, Hayate, Vivio, and Einhard, bound not only by shared experiences but by love, devotion, and a life intertwined.
It was a connection as much emotional as it was practical, a subtle, unspoken strength that radiated outward, lending Hayate the patience, clarity, and quiet confidence she would need to navigate this delicate mission. In their shared devotion, their trust and partnership, she found a foundation steady enough to guide her through even the most fragile and complex of hearts.
She drew a slow, steady breath, letting the resonance of her family anchor her. The street seemed to hold its breath alongside her, each shadow and corner vibrating with latent potential and quiet tension. Every pulse of the Goldia ring, every subtle emotional echo, every memory of shared warmth reminded her that this was a mission they would face together—not with force, but with trust, empathy, and the quiet courage that comes from hearts intertwined.
Her voice cut through the stillness, calm, assured, carrying the weight of determination. “Alright,” she said, a soft, serene smile brushing her lips. “Let’s get settled in. This isn’t just a mission. It’s a story—a life. And we’re here to guide it to a safe ending.”
In that moment, as the invisible threads of connection stretched between her and her family, she felt a profound certainty: together, they could face anything. Not with brute strength, but with patience, care, and the unyielding power of hearts bound by love—complex, beautiful, and shared among them all.