The blood-red moon hung over the ruins of an abandoned temple deep in the mountains, far from any Demon Slayer outpost.
Mitsuri Kanroji, the Love Hashira, had been tracking a string of disappearances when the scent of overwhelming demonic power hit her like a wave.
Her pink-and-green braids whipped in the night wind as she gripped her flexible Nichirin sword, heart pounding with a mix of fear and that stubborn determination to protect people.
Mitsuri burst into the central chamber, her sakura-patterned haori fluttering. There he stood, Muzan Kibutsuji, the Demon King himself, in his elegant male form: tall, pale, raven hair slicked back, crimson eyes glowing with ancient arrogance.
"I've been expecting you," Muzan said, turning in her direction.
"You... you're the one who killed so many of my comrades!" Mitsuri cried, voice trembling but fierce.
Tears pricked her eyes at the thought of her fallen friends, but her body, eight times denser in muscle than any normal human, coiled with explosive strength.
"I won't let you hurt anyone else!"
Muzan turned slowly, a cruel smirk curling his lips. His presence was suffocating, like the air itself bent to his will.
"A Hashira? How perfect. The overly bubbly one , no less. So soft. So weak. I will enjoy breaking you." He stepped closer, his voice a velvet blade. "Your kind always fights so passionately. It's irritating."
Mitsuri got into a fighting stance.
"You want to fight me? Aren't you supposed to be the Love Hashira?"
"You don't deserve my love."
Mitsuri lunged, her whip-like sword slicing through the air in fluid, love-driven arcs. But Muzan so fast, it seemed impossible.
He dodged with lazy grace, then countered by reshaping his arm into whipping tendrils of flesh that disarmed her in seconds. Her sword flew in the air and landed on the ground a good distance away from her.
She refused to yield. Even as he pinned her against a stone pillar with inhuman strength, her powerful legs kicked and her fists hammered at his chest.
"Let me go, demon!" Mitsuri screamed. "I'll-"
"You'll what?" Muzan shot back.
Muzan's crimson eyes bored into hers, drinking in her flushed cheeks, the rapid rise and fall of her generous breasts beneath her uniform, the way her curvaceous body strained against him.
For the first time in centuries, something stirred in the Demon King beyond mere irritation or boredom.
This woman's raw, overflowing vitality... it was intoxicating. A perfect contrast to his cold eternity.
"Protect them?" He laughed softly, low and dangerous, as one clawed hand trailed down her side, feeling the impossible muscle hidden under soft, womanly curves.
"You can't even protect yourself, little Hashira. But perhaps... I can show you a different kind of strength. One that consumes everything."
Mitsuri's breath hitched. She should have been terrified. She was terrified, but as his demonic aura washed over her, corrupting, seductive, and promising pleasure beyond human limits, something shameful fluttered in her belly.
Her body, so sensitive and affectionate by nature, betrayed her with heat.
'N-no... this isn't right... but... why am I feeling this way?' she thought, heart racing erratically.
Muzan leaned in, lips brushing her ear.
"Because deep down, even the Hashira of Love craves to be devoured."
With a flick of his power, he shattered the last of her resistance with brute force alone. He flooded her veins with a controlled trace of his blood. Not enough to turn her, but enough to ignite every nerve ending into blazing sensitivity.
"Don't try to fight it, little one," Muzan grinned. "You can't."
Mitsuri forgot about her sword and her mission blurred under waves of unwanted, overwhelming desire.
Muzan pulled her close, claiming her mouth in a bruising, dominant kiss that stole her breath and made her whimper. Mitsuri's hands, meant to fight, instead clutched at his shoulders as her mortal body melted against his immortal one.
Muzan wasted no time. He tore open the front of her Demon Slayer uniform with effortless claws, exposing her pale, heaving breasts, so full, soft, and topped with rosy nipples already pebbled from the cool night air and the fire now raging inside her.
Mitsuri gasped, cheeks burning crimson, but her hips instinctively rolled against the growing bulge pressing against her thigh.
"You're even more delectable than I imagined," Muzan murmured, voice dripping with dark amusement.
He cupped one heavy breast, thumb circling the nipple until she arched with a needy whine.
"So sensitive. So eager to please. Is this what your precious 'love' feels like, Hashira? Pathetic... and delicious."
He lowered his head, fangs grazing her skin before his tongue, longer and more dexterous than any human's, lavished her nipple. He sucked hard, drawing a loud, embarrassing moan from Mitsuri's lips.
Her hands tangled in his black hair, pulling him closer even as tears of conflicted pleasure slipped down her cheeks.
"Ahh~! Muzan... d-don't... it's too much...!" Mitsuri fought, but her body said otherwise.
Her thighs squeezed together, slickness already soaking through her panties as his free hand slid down her toned stomach to the waistband of her skirt.
With a wicked chuckle, he ripped the rest of her clothing away, leaving her completely bare. Mitsuri's curvaceous form was a masterpiece; plush hips, thick thighs powered by superhuman muscle, and a glistening, pink puffy pussy already dripping with arousal.
"You smell... heavenly."
Muzan drank in the sight, his own clothes dissolving into shadows to reveal a sculpted, pale body and a massive, throbbing cock—thick, veined, and far larger than anything human, with a slight demonic ridge along the underside.
"Look at you," he taunted, fingers parting her slick folds. "Dripping wet for the enemy."
Two long digits plunged inside without warning, curling expertly against her inner walls. Mitsuri cried out, back bowing as intense pleasure shot through her.
"Does fighting me excite you this much, or are you simply a whore for demonic cock?"
Mitsuri shook her head frantically, but her hips bucked greedily against his hand.
"N-no... I-I'm not... ahhn~! It feels so good... why does it feel so good?!"
Muzan added a third finger, stretching her, scissoring while his thumb rubbed firm circles over her swollen clit.
Her juices coated his hand, obscene wet sounds echoing in the temple ruins. He watched her face intently; the way her bright green eyes glazed over, her plump lips parted in constant moans, the adorable flush spreading across her entire body.
When Muzan noticed Mitsuri was trembling on the edge, he withdrew his fingers and lifted her effortlessly, pinning her against the stone wall with her legs wrapped around his waist.
The head of his enormous cock nudged her entrance, smearing her wetness.
"Beg for it," he commanded, voice low and authoritative. "Beg the Demon King to fuck you senseless."