In a world shaped by swords and sorcery, where gods had once walked openly among mortals and left only fragments of themselves behind, there existed a continent ruled not by chaos, but by a single, towering power.
The Hoshimi Empire.
It was a name spoken with reverence by scholars, fear by enemies, and pride by those who lived beneath its banner. For over two thousand years, its borders had endured—unbroken, unbowed—stretching across fertile plains, sacred mountains, and ancient ley lines where magic itself seemed to breathe. While other kingdoms rose and fell like fleeting sparks, the Hoshimi Empire stood eternal, a monolith of order in a turbulent world.
At its head sat Hoshimi Masaki, the Thirty-Eighth Emperor of the Hoshimi bloodline.
And yet, despite the title of "Thirty-Eighth," Masaki was no ordinary ruler bound by the frailty of time.
Through wisdom, divine contracts long forgotten, and relics whose origins traced back to the age of gods, Emperor Masaki had ruled for over two thousand years. He was at once a man and a legend—his presence alone enough to silence courtrooms, his gaze sharp enough to pierce lies before they were spoken. To the people, he was an immortal guardian. To the nobility, an immovable wall. And to the world beyond the empire, a warning: do not challenge Hoshimi.
Under his reign, the empire flourished. Trade routes prospered. Magical academies produced prodigies. Military might deterred even the most ambitious warlords. Peace, though never perfect, endured longer than any historian believed possible.
And yet—
This would not be a story worth telling if peace were all there was.
For even empires blessed by gods are not immune to cracks in their foundations.
The problem came not from invasion, nor rebellion, nor the slow rot of corruption.
It came from the future.
From the Emperor's son.
Hoshimi Kazuo, Crown Prince of the Empire, was a man beloved by the people and scrutinized relentlessly by the court.
Brilliant without arrogance, disciplined without cruelty, and kind in ways that unsettled those who believed rulers must be distant, Kazuo was—by all accounts—the perfect successor. The imperial court had prepared for his ascension since the day he could walk.
And so, in accordance with ancient tradition, four women were chosen.
Four consorts, selected not merely for love, but for the empire itself.
One possessed unrivaled magical genius, capable of reshaping battlefields with a single incantation.
One embodied merchant and political brilliance, her mind sharper than any blade, her influence already extending through the empire's economic arteries.
One carried a powerful and graceful body honed in combat, a warrior whose loyalty was absolute and whose strength rivaled generals.
And one—
One was said to rival the gods themselves in beauty, a woman whose smile could topple nations, whose true profession as an assassin remained hidden behind silk and grace.
Each woman was extraordinary. Each was chosen by the imperial court. And each, by law and tradition, had the right to become the future Empress.
The struggle was fierce.
Years passed as the four consorts competed—not always openly, not always cruelly, but relentlessly—to earn the Crown Prince's heart. Schemes were woven. Bonds were tested. Sacrifices were made.
And in the end?
They lost.
Not to each other.
But to a commoner.
Her name was Shimuzu Miharu.
Miharu was ordinary by every visible metric.
She bore no noble blood. She commanded no armies. She wielded no fame. And yet, fate seemed to twist itself around her footsteps.
Orphaned young, she endured countless trials—poverty, prejudice, loss—and through sheer perseverance found her way into the Imperial Academy, a place where nobles sharpened themselves into future pillars of the empire.
It was there that fate intervened.
One quiet afternoon, she encountered a young man sitting alone, burdened by exhaustion and invisible expectations. He was polite, distant, and clearly drowning beneath responsibilities he could not voice.
Miharu, unaware of his true identity, spoke to him as an equal.
She listened.
She empathized.
She offered nothing grand—only a moment of genuine kindness.
And that moment changed everything.
The Crown Prince, tired of being seen only as a symbol, saw in her something rare: sincerity untouched by ambition.
Thus began a love story that defied the empire's expectations.
But—
Enough of that.
Because this is not the story of that love.
Sunlight filtered softly through the tall stained-glass windows of a vast ducal library, illuminating rows upon rows of ancient tomes. The air smelled faintly of parchment and ink—a scent both comforting and heavy with history.
At a large oak table sat a young man, his posture slumped, chin resting against crossed arms.
His name was Sumeragi Rin.
Age fifteen.
The only son and heir of the Sumeragi Dukedom, one of the most influential noble houses within the Hoshimi Empire.
And—unknown to everyone but himself—someone who had been reincarnated from another world.
Rin did not know this world was a novel.
He did not know he was standing inside a story.
All he knew was that things did not add up.
Across from him stood a girl of the same age, chest puffed slightly, one finger raised as if lecturing a classroom. She wore a maid's uniform, though her posture and expression were anything but formal.
Her name was Harumi.
An orphan taken in by the Sumeragi family years ago, she had grown up alongside Rin—more sibling than servant, more friend than subordinate. When alone, titles dissolved, and honesty took their place.
Currently, Harumi was imitating a professor with unsettling enthusiasm.
"And thus," she declared dramatically, "the Hoshimi Empire stands as the central power of the continent—"
"Harumi," Rin groaned, sliding further down onto the table. "Why are you telling me this now?"
She paused.
Then lowered her finger.
"Because, Rin," she said more quietly, "you needed to know."
Rin lifted his head just enough to glare at her.
"I hate this world."
The words slipped out before he could stop them.
Harumi blinked.
"…Young master."
"No," Rin muttered. "Don't 'young master' me. You tell me this place is a novel—a novel—titled 'It's Not One of the Consorts', and expect me to just… what? Smile?"
She hesitated.
"I told you," Harumi said carefully, "because I'm certain we're going to get caught up in the plot. And well… you might unknowingly destroy it."
Rin straightened.
"What?! How is that even possible?!" he shot back. "And even if things don't go as planned, it's not like it's the end of the world, right?!"
Harumi's expression hardened.
"No."
Rin froze.
"It is super duper important for the plot to be followed," she said firmly, "because the protagonist—Shimuzu Miharu—has the power to save the Hoshimi Empire."
Rin stared at her.
"…You're kidding."
"I'm not."
A strangled sound escaped his throat.
"AAAAAAAHHHHH!"
He slammed his forehead onto the table.
Harumi, unfazed, raised one finger again—cutely this time.
"Miharu is the Aeon of Hope."
Silence.
"She must awaken her godlike power to save the empire," Harumi continued, voice steady. "Otherwise… we will all die."
Rin slowly lifted his head.
"…Die?"
Harumi nodded.
"The final boss of the novel," she said, "is the Aeon of Destruction. And it's coming."
An Aeon.
A power born from the remnants of gods.
Rin had heard the term before—in history lessons, whispered legends. Aeons were not merely abilities; they were beliefs made manifest. Each carried a symbol, a concept so powerful it bent reality itself.
Hope. Destruction. Order. Ruin.
When an Aeon manifested, the world changed.
And always, it was tied to fate.
"The Hoshimi Empire itself," Harumi added gently, "was born because of the Aeon of Hope. Two thousand years ago, when war consumed the continent… Hope intervened. And the empire was founded."
Rin leaned back, rubbing his temples.
"So… history is repeating."
"Yes."
"And Miharu is supposed to stop it."
"Yes."
"…And I'm a walking anomaly from another world," Rin muttered, "with knowledge I shouldn't have."
Harumi smiled.
"That's why I told you."
Rin let out a long sigh.
Little did he know—
That this moment, in this quiet library, was the true beginning.
Not of Miharu's story.
But of his.
For Sumeragi Rin, heir to a great dukedom, reincarnated soul, and unintended variable in a world governed by fate—
Had just stepped onto the stage of a legend far greater than the novel itself.
And once fate noticed him—
It would never let go.