Chapter One: The Torn Spell
The air crackled with raw magic, unstable and erratic, as Kazuki desperately tried to rein in the spell's energy. His fingers glowed with power, but something was wrong—terribly wrong.
Yuna: "Kazuki! Stop! It's going out of control!"
Kazuki: "I—I'm trying! It won't—"
A sudden pulse of magic rippled outward like a shockwave, throwing everyone back. Rin scrambled to conjure a barrier, but the force shattered it instantly.
Rin: "No—this isn't normal magic! It's warping reality itself!"
Chihaya: "Kazuki, release it! Let it go before—"
A violent surge exploded in front of them. The last thing Kazuki saw was Yuna reaching for him, her expression frozen in horror before everything went black.
When he opened his eyes, the sky was a murky red, painted with the smoke of distant battles. The scent of blood and damp earth filled the air.
Kazuki: Where... are we?
Beside him, Kuriko let out a soft groan, gripping her wrist where her magic had sparked moments ago.
Kuriko: "Kazuki… this isn't our world."
They barely had time to process their surroundings before the shadows moved. Figures in black descended from the trees—masks concealing all but the cold gleam of their eyes. Their strikes were precise, merciless, forcing Kazuki and Kuriko to react purely on instinct.
Kuriko tried to summon her magic—but nothing happened. Her greatest weapon had vanished.
Kazuki barely dodged a kunai aimed straight for his chest. He grabbed Kuriko's wrist, pulling her toward cover—but escape was impossible. They were surrounded.
Then came the voice—calm, calculated, final.
Clan Leader: "You are weak. You are lost. You will either learn the way of shadows... or perish."
There was no choice. They submitted.
Years in the Shadows—Becoming Ninja
Their training was brutal. Kazuki and Kuriko learned quickly that magic had no place in this world—it was steel and silence that ruled.
Kazuki mastered endurance, his body pushed beyond limits he never imagined. Kuriko mastered precision, her strikes lethal and elegant. Together, they became feared warriors.
In time, they faced horrors beyond what either of them thought possible. It wasn't just men they fought—it was creatures forged in darkness.
They battled enormous oni that could crush a man's bones with a single swipe. They hunted spectral assassins who struck from nothingness. They stood against beings whose existence defied logic, their blades the only answer to death.
Through every battle, through every wound—Kazuki and Kuriko were side by side.
And in those long years, Kazuki began to see something he had never understood before.
He had once believed his heart belonged to Yuna. He had once accepted the pull of tradition, the expectations of their world.
But here, in blood and war, there was only Kuriko.
Her presence had become his anchor. Her laughter, rare but precious, was the only light in endless darkness. Every battle, he fought harder—not just to survive, but because she was there, fighting with him.
One night, after slaying a monstrous beast that had terrorized their clan, Kazuki sat beside Kuriko beneath the stars.
His body was exhausted. His heart was restless.
Kazuki: "I never truly understood what love meant."
Kuriko looked at him, tilting her head slightly.
Kuriko: "Love?"
Kazuki: "I thought I knew. I thought I had it figured out. But being here... I realize now. It was never Yuna. It was never the others."
Kuriko's breath hitched, though her expression remained unreadable.
Kazuki: "It's you. It's always been you."
Silence stretched between them, the weight of his words settling. And then, Kuriko smiled—slow, warm, real.
Kuriko: "It took you long enough."
Kazuki chuckled. He reached for her hand, his grip firm but reverent.
Kazuki: "Marry me."
Kuriko didn't hesitate.
Kuriko: "Yes."
That night, they vowed themselves to one another—not just as warriors, but as husband and wife.
When they returned to their clan, the elders watched them with knowing eyes.
Clan Elder: "You have become more than mere warriors. You are family. And for that, you shall receive the gift of longevity."
Seven hundred years of life.
Seven hundred years together.
Kazuki and Kuriko entered this world as lost souls. Now, they were bound—forever.
he Eternal Vow
The moon hung full and bright over the hidden valley where the wedding was set to take place. The great clan had gathered—warriors, elders, and those who had fought beside Kazuki and Kuriko for years. Lanterns swayed in the evening breeze, casting warm golden light over the ceremonial grounds.
Kazuki stood beneath the sacred cherry blossoms, watching the petals flutter gently in the wind. His heart was steady. He had faced countless battles, stared death in the eyes—but nothing compared to the way Kuriko made him feel.
Then, she appeared.
Kuriko walked toward him, dressed in a breathtaking white kimono embroidered with silver cranes. A crimson sash wrapped elegantly around her waist, the symbol of strength and devotion in their clan. But beyond her beauty, it was the look in her eyes that held him in place—the quiet certainty, the unwavering love.
Clan Elder: "Tonight, we honor warriors who have endured hardship, and in battle, found the truest bond. Kazuki, Kuriko—you stand before us, not as mere shinobi, but as two souls bound by fate."
The ceremony was traditional yet deeply personal, blending ancient customs with the unbreakable bond Kazuki and Kuriko had forged.
As they knelt before the altar, sake cups were passed between them—a symbol of sharing all burdens and joys in life.
And then, came the vows.
Kazuki reached for Kuriko's hands, his grip firm but gentle.
Kazuki: "I have fought beside you, bled beside you, lived and survived with you. In war, in hardship, in the quiet moments between battles—you have been my light. I vow that no one else will ever hold my heart. No one else will ever stand beside me the way you do. You are the only one I will ever want in my arms."
Kuriko's eyes shone, unguarded and filled with love.
Kuriko: "From the moment we were cast into this world, I have walked beside you. I have seen you grow, change, become stronger. And through every battle, through every night beneath the stars, I knew—there was no one else. Only you. I vow that for all the years granted to us, for the centuries ahead, I will love only you. You are the only one I will ever need."
Their clan watched in solemn approval. The elders nodded.
Clan Elder: "Then, let it be known—Kazuki and Kuriko, bound by love, bound by eternity."
Kazuki pulled her close, their foreheads touching, the warmth between them undeniable. The cheers of their clan echoed, but in that moment, it was only the two of them, locked in the promise they had made.
They were no longer lost souls cast into this world.
They were husband and wife.
Bound not just by vows—but by devotion that would endure seven hundred years.
Three Years of Love and War
The passing seasons had shaped Kazuki and Kuriko into legends within their clan. For the last three years, they lived as more than warriors—as husband and wife, as partners in battle and in life. Their days were filled with strength, their nights with tenderness, and each moment they spent together only deepened their bond.
Their Training: Every sunrise found them sparring beneath the ancient trees, blades flashing as they tested each other's limits. Kazuki's precision had sharpened—Kuriko's speed had become unmatched. They fought not out of necessity, but out of the joy of learning from one another. Their movements were fluid, perfectly synchronized, as though their bodies knew the rhythm of the other's heart.
Their clan watched in admiration, murmuring that no two warriors had ever complemented one another so perfectly.
Their Battles: Side by side, Kazuki and Kuriko faced the dangers of the land—the towering oni that threatened villages, the elusive bandits who struck in the dead of night. Each battle was a test of their trust, their strength, and their unbreakable bond. Kuriko's blade flashed like lightning, and Kazuki covered her blind spots without hesitation.
Kuriko: "I don't need magic to be strong anymore."
Kazuki smiled, gripping her hand after one particularly grueling battle.
Kazuki: "You never did. You were always powerful—always magnificent."
Their Nights Together: Though war was their world, love was their sanctuary. After long days of battle, they returned to their shared home within the clan's fortress—where warmth replaced bloodshed.
Kazuki cooked for Kuriko, the scent of roasted fish and seasoned rice filling their quarters. She would tease him about his persistence in perfecting each dish, but the softness in her eyes betrayed the truth—she loved every second of it.
They would sit together under the lanterns, sharing quiet conversations, sometimes speaking of the future. Kazuki would brush his fingers through Kuriko's hair, marveling at how fate had bound them together in ways no spell ever could.
Kuriko: "Have you ever thought about... more?"
Kazuki: "More?"
Kuriko hesitated. For so long, they had been warriors—survivors. But in those peaceful moments, she let herself wonder.
Kuriko: "A family. A life beyond battle."
Kazuki stared at her, surprised—but not fearful. The idea settled within him, not as an impossible dream, but as something real. Something they could have.
Kazuki: "With you? I'd want nothing more."
Kuriko smiled, relief and happiness shining in her gaze.
But before she could speak again—before they could truly embrace that future—fate intervened.
The Summoning: A surge of magic crackled in the air. The world trembled as a portal tore open before them.
Yuna. Rin. Chihaya.
Their forms appeared like ghosts from another life, their expressions frantic.
Yuna: "Kazuki! We found you—we're bringing you back!"
Kazuki barely had time to react before the energy wrapped around him and Kuriko. The world they had built—the love they had found—vanished in an instant.
The last thing Kazuki saw was Kuriko reaching for him, her voice breathless.
Kuriko: "No matter where we go—no matter what happens—you are mine, and I am yours."
Then, darkness.
The portal ripped open like a wound in reality, and Kazuki and Kuriko were pulled through with unforgiving force. The scent of the Sengoku world—blood, earth, steel—was stripped from their senses, replaced by the familiar magic-infused air of their original realm.
When Kazuki landed, his body tensed instinctively. Years of battle had sharpened his reflexes, and his first thought wasn't relief—it was Kuriko.
Kazuki: "Are you all right, my darling?"
Kuriko stood beside him, steady despite the dizzying shift between worlds. She smiled at the concern in his voice, placing a hand on his chest.
Kuriko: "Yes, my beloved. Now that I'm back in your arms."
The words were soft, filled with certainty—unshaken love.
And then—chaos.
Yuna gasped, her eyes widening with shock, fury bubbling beneath the surface.
Yuna: "Kazuki!"
She dashed forward, arms outstretched, desperate to reclaim him. But instead of turning to her—instead of embracing her like she expected—he remained by Kuriko's side, his grip on her hand firm.
Yuna skidded to a stop, disbelief flashing across her face.
Yuna: "Get away from her! You're supposed to be with me!"
Kazuki met her gaze, his expression calm but unyielding.
Kazuki: "I'm already with my one true wife."
Silence. Tense. Heavy.
Rin and Chihaya exchanged glances, sensing the shift, but it was Yuna who struggled to comprehend.
Yuna: "Wait a minute—you're saying she's your true wife? Not me?"
Her voice cracked with childlike disbelief, her fists clenched. Magic sparked around her fingers, frustration unraveling into reckless energy.
She lashed out—not violently, but impulsively, a desperate attempt to reset what she believed to be the rightful order of things.
Before her spell could reach Kazuki, smoke exploded into the air.
Kuriko had already moved.
With a swift flick of her wrist, she tossed a small bomb—a special concoction of knockout powder infused in a dense smokescreen. The magic backlash was immediate, Yuna's eyes fluttering before she collapsed into unconsciousness.
Rin and Chihaya stared, shocked but not entirely surprised.
Rin: "...Okay. That was unexpected."
Chihaya: "What is going on?"
Kazuki glanced at Kuriko, their hands still entwined, before turning to his old companions.
Kazuki: "Sit down. It's a long story."
Kuriko smirked, nodding in agreement.
Kuriko: "And you won't believe half of it."
Yuna lay unconscious, her breathing slow and steady from Kuriko's knockout bomb. Meanwhile, Rin and Chihaya sat across from Kazuki and Kuriko, their expressions tense, waiting for an explanation.
Kazuki exhaled, casting a glance at his wife before turning back to the others.
Kazuki: "We were gone for seven years."
Rin blinked, her brows furrowing.
Rin: "Seven years? But… you've only been missing for seven weeks."
A long silence settled between them. Chihaya exchanged a look with Rin before turning her gaze back to the couple, studying them closely.
Chihaya: "You do look… slightly different. A little older—but still young. How?"
Kuriko smirked, reaching for Kazuki's hand. Their fingers intertwined, their rings glinting under the dim light.
Kuriko: "We were granted longevity. Seven hundred years of youth. By the time those years pass… you'll all be gone, and Kazuki and I will still be together."
Rin and Chihaya stiffened, their expressions flickering between shock and understanding.
Before they could respond, Yuna stirred.
She groaned, sitting up, rubbing her temples before her gaze locked onto Kazuki—and then onto Kuriko, her hand in his. The rings. The closeness. The unmistakable love between them.
It hit her like a punch to the chest.
Yuna: "Kazuki… take that ring off. Get rid of it. Come back to your true wife—me."
Kazuki didn't hesitate.
Kazuki: "No."
The air grew heavy with tension. Yuna's expression twisted, anger bubbling beneath the surface.
Yuna: "No?! You belong with me! Not her!"
Kazuki's gaze hardened.
Kazuki: "We spent seven years in constant battle, fighting for survival. And yet, through all the bloodshed, through every moment—Kuriko was there. She is my wife. She is the one I fought beside, loved, and chose. No one—not even you—will take that away."
The finality in his voice shattered something within Yuna.
Her breathing hitched as realization set in—Kazuki wasn't the man she had known. He had changed. The years had reshaped his heart, and it no longer belonged to her.
But instead of acceptance, rage took over.
Yuna: "Kuriko is going to be young with you for centuries while I—"
She clenched her fists, her body trembling.
Yuna: "This isn't fair! You were mine!"
Kuriko sighed, tapping her fingers against the hilt of her kunai.
Kuriko: "You thought he was yours. Clearly, he had other plans."
Yuna screamed in frustration, summoning her magic, attempting to strike Kuriko—but before her spell could take form—
Kuriko: "Nope. Not dealing with this."
She flicked another smoke bomb into the air, releasing a dense cloud of knockout powder. Yuna's body swayed before she collapsed back into unconsciousness.
Rin and Chihaya sighed.
Rin: "Well. That happened again."
Kuriko dusted off her hands, turning back to Kazuki with a satisfied smirk.
Kuriko: "Now, where were we?"
Kazuki chuckled, shaking his head.
Kazuki: "Explaining our long story."
Kuriko: "Right. Well, let's make it entertaining then."
With Yuna out cold, Kazuki and Kuriko prepared to unravel their tale, their love, and the life they had forged together—one that no amount of magic, desperation, or jealousy could ever undo.
The news spread through the academy like wildfire—Kazuki and Kuriko had returned. But instead of rejoining classes, they were being granted automatic graduation, allowed to leave whenever they wished.
The reactions were immediate.
The Girls: Furious. How could Kazuki—formerly awkward, formerly clueless—be completely off the market? And worse, with Kuriko, one of the academy's most desirable women?
The Boys: Equally enraged. The unattainable goddess that many had admired from afar was married. And to Kazuki, of all people.
The uproar was undeniable.
But Kazuki and Kuriko didn't care for the petty frustrations of students who had never endured war, never fought for survival, never known the true meaning of strength.
So, before leaving, they decided to give their former peers a proper glimpse of what they had become.
The Grand Reveal:
As the gathered crowd bickered and gossiped, a few students caught movement—high above.
Gasps rang through the room as heads tilted upward.
There, clinging effortlessly to the ceiling beams, were Kazuki and Kuriko—dangling upside down with an almost casual air, as if gravity was merely an option for them.
Kuriko smirked down at the stunned faces below.
Kuriko: "You all seem upset. But what did you expect? Kazuki's mine, and I'm his. That's not changing."
With synchronized movements, they let go of the beams, flipping effortlessly through the air before landing gracefully in the center of the hall.
Without missing a beat, they tugged at their outer garments, revealing the ninja attire beneath.
The response was instant.
The boys—mesmerized, unable to look away from Kuriko in her sleek, battle-ready ninja gear, her form perfectly suited for both elegance and lethality.
The girls—stunned into silence, watching Kazuki stand with a quiet confidence, dressed in his battle-worn armor, the red scarf trailing behind him, exuding an aura of absolute control.
They had changed.
No longer the uncertain schoolboy and the high-society heiress.
They were warriors. Shinobi. Husband and wife.
They were legends.
Kazuki glanced at Kuriko, amusement flickering in his gaze.
Kazuki: "Think we left an impression?"
Kuriko smirked, adjusting her gear.
Kuriko: "More than enough."
Without another word, they turned, leaving behind the school that had once been their world—now only a memory of a past they had long since outgrown.
Kazuki stood in his dorm, the quiet hum of the evening settling over him as he packed away the remnants of his former life. The uniform, the scattered books, the personal belongings that once felt significant—all of it was a part of a life that no longer belonged to him. He had changed. He was no longer a student bound by school rules, no longer the clueless boy desperate for approval.
Now, he was a warrior. A husband. A man who had survived seven years of war.
As he closed his bag, a familiar presence leaned against the doorway.
Kuriko.
She smirked, watching him with that same sharp gaze that had seen him through battle after battle.
Kuriko: "Still holding on to memories?"
Kazuki chuckled, shaking his head.
Kazuki: "Just putting away the past."
Kuriko nodded, though her expression darkened slightly.
Kuriko: "I have to do the same."
Stepping into the grand Kazetsubaki estate was like stepping into another world—one where wealth dictated power and tradition overshadowed individuality.
Kuriko barely made it through the entrance before her family descended upon her, voices sharp, demanding.
Kuriko's Father: "Where have you been? Seven weeks, gone without a word!"
Kuriko's Mother: "You've disgraced us with your absence. Explain yourself, now."
Kuriko stood still, her expression unreadable. Then, her hand casually shifted—just enough for the ring on her finger to catch the light.
Silence.
Her parents' gazes locked onto the band, their expressions morphing from shock to barely contained rage.
Kuriko's Father: "What is that?"
Kuriko: "A wedding ring."
Her mother's breath hitched, her hands trembling.
Kuriko's Mother: "You married him? The boy we intended for you?"
Kuriko smirked, tilting her head.
Kuriko: "Yes. And against your expectations, it wasn't out of obligation. It was because I love him."
Her father's expression twisted.
Kuriko's Father: "Love? What nonsense. You were supposed to uphold our legacy, not run off into childish fantasies. What have you done?"
Kuriko folded her arms, her smirk unwavering.
Kuriko: "I've become something greater than a pawn in your plans. Kazuki and I are ninja now."
The fury that erupted was immediate.
Kuriko's Mother: "A ninja?! You disgrace our name! Do you understand what you've done? No member of this family will ever be reduced to some lowly assassin!"
Kuriko shrugged, unfazed.
Kuriko: "Then I guess I'm not part of this family anymore."
Her father stepped forward, his voice steel.
Kuriko's Father: "You will abandon this reckless life. Bring your husband here, where we can control this mistake, or be disowned."
Kuriko's smirk turned cold.
Kuriko: "By all means, go ahead. I abandoned the Kazetsubaki name years ago. And now that Kazuki and I are back, the only thing I want is my husband. Not this ridiculous facade of power you clutch so desperately."
She reached into her sleeve—her reflexes sharper than they had ever been.
With a swift flick of her wrist, a smoke bomb exploded, engulfing the room in a dense cloud.
By the time it cleared, she was gone.
Her family stood frozen, their fury solidified into something sharper.
Kuriko's Father: "She will regret this betrayal."
Kuriko's Mother: "If she thinks she can escape us… she's mistaken."
And so, a new war began.
At their grand estate, within its walls, Kazuki and Kuriko existed not as aristocrats, but as something more—a family bound by love, sharpened by battle, and destined for eternity.
The warm glow of lanterns filled the mansion as Elizabeth, the small ghost girl who had always clung to Kuriko, floated excitedly around the room, her translucent form shimmering with joy.
Elizabeth: "Mommy, you're finally back! And now I have a daddy too!"
Kazuki smiled, watching as Kuriko caught the ghostly child in a soft embrace.
Kuriko: "Yes, Elizabeth. We're together again."
The little spirit radiated pure happiness, her small hands pressing against Kazuki's arm.
Elizabeth: "Does that mean you'll stay forever?"
Kazuki nodded, exchanging a glance with Kuriko before speaking.
Kazuki: "We will. No matter what happens, we have longevity—seven hundred years of life ahead. We'll be together for a very, very long time."
Kuriko knelt beside Elizabeth, brushing back the girl's wavy, ethereal hair.
Kuriko: "But we won't live the way the Kazetsubaki family wants us to."
Elizabeth tilted her head curiously.
Kazuki: "We're assassins, Elizabeth. That's what we've become. It's the life we know now."
The girl's expression turned thoughtful before she nodded in understanding.
Elizabeth: "Assassins who kill bad people, right?"
Kuriko chuckled, gently tapping Elizabeth's forehead.
Kuriko: "That's right. We choose our targets wisely. We fight for justice, not blind killing. That's our oath."
Elizabeth grinned, clapping her hands together before floating up toward the ceiling in excitement.
Elizabeth: "That sounds amazing! So strong, so cool! A perfect mommy and daddy!"
Kazuki chuckled at her enthusiasm, but then Kuriko's expression softened, something unspoken lingering in her eyes. She glanced at her husband, fingers brushing the gold band on her ring finger.
Kuriko: "Kazuki… about what we talked about before."
Kazuki tilted his head slightly.
Kazuki: "You mean… starting a family?"
Elizabeth gasped, eyes wide, positively glowing with happiness.
Elizabeth: "A brother?! Or a sister?! I can have a sibling?!"
Kuriko laughed, brushing Kazuki's arm with affection.
Kuriko: "It's something I truly want. A child to call our own."
Kazuki smiled, warmth filling his chest as he gently pulled her close.
Kazuki: "Then we will, Kuriko. When the time is right."
Elizabeth squealed with delight, twirling around them in excitement.
And as the night settled in, Kazuki and Kuriko rested together in their grand estate, Elizabeth tucked between them, their new future stretching ahead—one filled with love, shadows, and the unbreakable bond they had forged through blood and fate.
A family, together forever.