I Took A Succubus's First Time

All of the nails rained down upon the corrupted one like a divine judgment, streaking through the air with terrifying velocity. She saw them descending, her crimson eyes widening in desperation as she flung her arms up in a futile attempt to shield herself. But the moment the first nail struck—rip!—her flesh was torn apart as though it were paper. A sickening crunch echoed as her bones shattered beneath the sheer force, blood splattering in violent arcs.

"Gaaaahhhhhh!"

A tortured scream tore from her throat, raw and unearthly, reverberating like a death knell throughout the battlefield. The force of the impact drove her body downward, her ravaged limbs twitching, unable to fully regenerate in time. The corruption within her writhed, struggling to stitch her form back together—but it was too slow. The pain was unbearable.

Kouhei surged forward.

His body glowed with an eerie dark radiance as he pushed himself beyond his mortal limits, channeling every last ounce of his strength into the Crimson Dance. The corrupted one's body was slashed apart over and over, her form jerking violently with each devastating strike. The scent of burning flesh and iron filled the air as her blackened blood splattered across the battlefield, staining the ground beneath them.

But it still wasn't enough.

As the final stroke of Crimson Dance descended, Kouhei's breath caught in his throat.

She was still standing.

Her body was mutilated, her once-menacing form now reduced to a grotesque, barely-held-together mass of writhing flesh and corruption. But she hadn't fallen. Not yet.

Kouhei staggered, his chest heaving, his vision swimming from exhaustion. His muscles screamed in protest, every fiber of his being begging him to stop. His knees buckled beneath him, threatening to send him crumbling to the ground.

But he couldn't stop.

His weary eyes locked onto Yuuna, her fragile form trembling in the distance. He clenched his teeth, forcing his battered body to move.

One step.

Another.

His legs burned with every stride, his mind clouded by the overwhelming weight of fatigue. But he refused to falter.

Finally—he reached her.

"Yuuna-san," he panted, wrapping an arm around her.

"K-Kouhei-kun… how…?"

Yuuna's breath was uneven, her delicate frame barely able to support itself. But her gaze—wide, disbelieving—was locked onto him. She had seen it. The impossible.

A human wielding mana.

A human performing Crimson Dance.

But that was absurd. Impossible. Humans lacked the ability to manipulate mana in such a way. Only demons and angels possessed that power, their very existence intertwined with the energy of the world.

And yet—Kouhei had done it.

It defied every rule of reality she had ever known.

"But that doesn't matter right now," Kouhei said, his voice firm despite his exhaustion. His grip on her tightened. "I don't think I can pull that off again… at least, not anytime soon. But I can still feel it—there's some mana left inside me. Take it. Use it to cast Crimson Gate again."

Yuuna's breath hitched.

Her pulse pounded in her ears as she stared at him, her mind racing.

"But this… this could kill you, Kouhei-kun."

Mana exhaustion. A fate worse than death. Even demons and angels—creatures whose very essence was intertwined with mana—suffered unimaginable agony when drained completely. If beings like them could barely endure it… then what of a human?

The thought sent a chill down her spine.

Kouhei, however, only smiled—a quiet, unwavering smile.

"It's okay," he whispered. "Just trust me."

Yuuna's heart clenched.

Then, something bloomed within her.

Warmth.

Something deep, something unshakable.

Kouhei had already done the impossible. He had defied reason, shattered every limit placed upon him. If he believed this could work, if he was willing to stake everything on it—then she would trust him.

A slow, trembling smile graced her lips.

Without hesitation, Kouhei leaned in.

Their lips met.

A spark ignited between them, an intoxicating heat spreading through Yuuna's body as their mouths moved in perfect rhythm. His breath, hot and ragged, mixed with hers. Their tongues entwined, their kiss deepening with every passing second, the taste of desperation and determination flooding their senses.

Something shifted within her.

A surge of power.

Yuuna's body tensed as she felt it—the mana seeping from Kouhei's very essence, flowing into her like a torrent of raw energy. His warmth enveloped her, filling the hollow emptiness within her depleted core.

Their kiss lingered, fervent and consuming, as her mana pool steadily replenished.

"You… making out in front of me…"

A voice slashed through the air, venomous and filled with rage.

"Have you no shame!?"

The corrupted one's shriek was no longer human—it was a fractured, twisted wail of pure loathing. The darkness surrounding her pulsed, thickening into an abyssal storm of fury. The wounds that had marred her body only moments ago began to mend, her mutilated flesh knitting itself back together at a terrifying pace.

The air around them grew heavy, oppressive.

The corrupted one's lips twisted into something inhuman, a grotesque grin splitting her face apart, jagged teeth glistening with malice.

"I'm going to kill you both…"

The air trembled.

And then—she lunged.

Faster than a blur, a whirlwind of death.

Her monstrous form tore through the space between them, her claws outstretched, aiming to rip them apart before they could even react.

Because surely—surely—they had nothing left to fight back with.

However…

"Crimson Gate!"

The moment Yuuna's voice rang out, the heavens obeyed. A blinding crimson light erupted from the sky, descending like the judgment of a wrathful god. The corrupted one barely had time to react before the devastating radiance engulfed her entirely, halting her advance as if an invisible force had bound her in place.

Then came the agony.

"Raaaaaaaaaghhh!"

A monstrous scream tore through the battlefield, raw and primal, reverberating in every direction. The corrupted one convulsed violently, her flesh burning away in layers. Dark tendrils of corruption writhed and snapped, unable to withstand the sheer power of the Crimson Gate. Chunks of decayed muscle and sinew were stripped from her body, dissolving into the fiery abyss. The once-imposing abomination writhed like a wounded beast, her form crumbling under the unrelenting divine assault.

But Yuuna knew—it wasn't enough.

Despite all the mana she had poured into the spell, the light flickered, struggling to maintain its full intensity. The corrupted one was powerful, her unnatural existence resisting complete eradication. Yuuna gritted her teeth, her trembling hands outstretched, but her body had already been drained beyond its limits.

It wasn't enough.

"Use mine, Yuuna-san!"

Kouhei's voice cut through the chaos, his words laced with urgency. A desperate plea.

Without hesitation, Yuuna reached into him.

A surge of raw energy coursed through her fingertips as she pulled at his mana, drawing it into herself. Though this was her first time attempting such a thing, it felt… natural. As if she had always known how to do it.

The power within Kouhei surged through her veins, a flood of energy so potent it nearly overwhelmed her. But she held firm.

Kouhei, on the other hand—

He felt himself shatter.

The sensation was unbearable. Like an unseen force was reaching into his very core, ripping his soul from his body, piece by agonizing piece. His vision blurred, the world around him turning into a haze of crimson and white. His muscles locked, his breath came in ragged gasps, and his entire body trembled from the sheer strain. His teeth clenched so hard that his gums split, blood trickling down his lips.

Yet—he endured.

He had to.

Not until the corrupted one was completely annihilated.

Yuuna poured every ounce of power she could muster into the Crimson Gate, its radiance flaring with newfound intensity. The battlefield trembled under its might, the very air crackling with energy. The corrupted one's cries grew weaker, her form disintegrating before their eyes, reduced to nothing but remnants of a nightmare.

Then—silence.

The light flickered, then vanished.

Yuuna staggered, her breath coming in shallow gasps. Her body refused to move, her limbs weighed down by sheer exhaustion. The moment the last drop of mana left her body, her legs gave out beneath her.

And then she saw them.

Where the corrupted one once stood, now lay four girls.

Their bodies were still, unconscious—but undeniably human. Their forms, though bruised and battered, had been freed from the corruption's grasp. The monstrous entity that had merged them into one had been obliterated.

It was over.

Kouhei let out a weak chuckle, his lips curling into a faint smile. "Thank… goodness…" His voice was little more than a whisper, his vision darkening as the weight of exhaustion overtook him. His body slumped, his consciousness slipping away.

Yuuna followed moments later.

The moment the battle ended, the two of them—drained of everything—fell into unconsciousness, their bodies collapsing beside each other.

The others rushed to their side.

Standing over the two, watching their peaceful, exhausted faces, Yumi let out a small sigh. "Well… it seems they truly pushed themselves beyond their limits. It's only natural that they would pass out the moment their bodies relaxed."

She knelt beside them, golden light emanating from her palms as she began channeling healing magic into their worn-out bodies. The warmth of her magic washed over them, mending their battered forms, soothing their frayed nerves.

"For now, let's get them somewhere safe," Nagisa said, her voice steady yet tinged with unease.

Her gaze drifted toward the four unconscious girls.

They had been the corrupted one.

Merged. Twisted.

Now, separated once more.

This was unlike anything they had encountered before.

An unsettling thought crept into her mind.

A corruption this powerful…

To fuse four individuals into a single monstrous entity…

What kind of being could do such a thing?

If the fallen angel who had corrupted them possessed the power to forge such an abomination—

Then just how powerful was that fallen angel?

A cold dread seeped into her bones.

For the first time since the battle had ended, she felt it—

A lingering, ominous presence.

Something was watching them.

And for reasons she could not explain…

It felt as though the true nightmare was only just beginning.