Years after the final battle, the world had found peace. Nezuko had been fully human for a long time, growing into a beautiful young woman in her early twenties; long pink hair, soft features, and a body that had filled out generously from years of normal life and occasional training.
Zenitsu had grown too. He was still anxious, still dramatic, but stronger, more confident in battle and in private moments with the woman he had loved for years.
Tonight they were alone in a quiet mountain house Zenitsu had bought with his Hashira earnings. Nezuko had come to visit, and the tension that had built between them for months finally broke after a shared dinner and too much sake.
Zenitsu's hands trembled as he pulled Nezuko close on the futon. "Nezuko… I've wanted this for so long. You're so beautiful… your body drives me crazy."
Nezuko smiled softly, eyes warm. She leaned in and kissed him first slow, then hungry. Zenitsu moaned into her mouth, hands roaming her curves.
He undressed her carefully, revealing her full, heavy breasts and wide hips. Her nipples were already hard. Zenitsu groaned at the sight.
"Fuck… your tits are perfect."
He latched onto one immediately, sucking hard. Nezuko gasped, "Ahhn…" fingers in his yellow hair. He sucked louder, tongue swirling, then switched to the other.
After a few minutes something shifted. A warm sweetness filled his mouth. Nezuko's body, still carrying some demonic traces even as a human had began lactating in response to Zenitsu.
Zenitsu's eyes widened but he didn't stop. He sucked harder, drinking her warm milk.
"Mmm… so sweet… your milk tastes so fucking good, Nezuko…"
Nezuko moaned louder, arching into him. "Ahhann… drink it… it feels good when you suck me like that…"
Zenitsu drank greedily from both breasts, switching back and forth, milk dribbling down his chin onto her soft skin. His hands squeezed her heavy tits, forcing more milk out.
"These milky tits are mine… I'm gonna drink from you every night…"
He kept sucking and drinking for long minutes until her breasts were sensitive and leaking freely. Nezuko was panting, thighs pressed together.
Zenitsu finally pulled back, lips shiny with milk.
"I need to taste the rest of you."
He spread her legs wide and buried his face between them. His tongue dragged up her wet slit, licking her clit before pushing inside. Nezuko moaned, hips bucking.
" Ahh… Zenitsu… nngh…"
He ate her out sloppily, sucking her clit and fingering her at the same time. Wet slurping sounds filled the room.
"Your pussy is so wet for me… dripping like a sex hungry slut…"
Nezuko's moans grew louder. "Ahhann… don't say that… mmmph!"
Zenitsu added a third finger, pumping faster.
"You are… my dirty little demon girl."
The next moment, Nezuko clamped her thighs around his head as she shuddered.
"Cumming… ahhhaaaannnn!!"
Zenitsu licked her through it, then climbed up. His cock was rock hard, leaking precum. Nezuko reached down and stroked him. "Put it in… I want you."
He rubbed the thick head along her folds, then slammed in with one thrust.
"Ahhhh—!" Nezuko cried out, back arching. "So big… you're stretching me so much…"
Zenitsu groaned, burying himself deep.
"Fuck… your pussy is gripping me so tight… so warm and wet… I'm gonna fuck you stupid."
He started pounding her missionary in hard, fast strokes.
Kpa! Kpa!! Kpa!!!
Her heavy tits bounced wildly with every slam. Zenitsu leaned down and latched onto a leaking nipple again, drinking her milk while he railed her.
"Mmm… your milk is making me harder… take this cock, Nezuko… this pussy is mine forever."
Nezuko moaned brokenly, legs wrapped around him. "Ahh… ahh… harder… drink more… nggnn!"
He switched breasts, sucking noisily while his hips snapped relentlessly. Milk leaked from the corners of his mouth as he fucked her.
After several minutes he pulled out and flipped her onto all fours. He slammed back in doggy style, gripping her hips hard.
Kpa-kpa-kpa-kpa!
"Ass up… just like that… fuck, your ass looks so good taking my cock." Zenitsu slapped her ass, watching it ripple. "You like that? Being fucked like a needy slut?"
Nezuko pushed back, moaning. "Yes… ahhann… fuck me harder… I'm your slut… ngghaaa!"
He reached around and squeezed her swinging tits, milking them while pounding deep. Warm milk sprayed onto the futon with every thrust. Zenitsu drank from her again, leaning over her back, sucking one tit from behind while hammering her pussy.
"These milky tits are so full for me… I'm gonna get you pregnant so they never stop leaking."
Nezuko came hard, walls clenching. "Cumming… ahhhaaaannnn!! Don't stop drinking!"
Zenitsu kept thrusting through her orgasm, then pulled out and sat against the headboard.
"Ride me. Bounce on this cock you love so much."
Nezuko straddled him reverse cowgirl, sinking down slowly. She started riding in deep bounces that made her ass slap his thighs loudly.
Kpa! Kpa!! Kpa!!!
Zenitsu slapped her ass repeatedly.
"Faster… fuck yourself on my dick… look at that ass bouncing… so fucking hot."
Nezuko rode harder, moaning loudly. "Ahhann… ahhann… your cock is so deep… hitting everything…"
He reached around and rubbed her clit while she bounced. Then he pulled her back against his chest, one arm around her waist, the other squeezing a tit and drinking from it as she continued riding.
Milk dribbled down both their bodies. Zenitsu groaned against her breast. "I'm gonna cum… load this pussy up…"
Nezuko slammed down faster. "Cum inside… fill me… ahhhaaaannnn!!"
He exploded, pumping thick ropes deep into her womb. Nezuko came again with him, trembling.
They rested only a minute before Zenitsu flipped her onto her back again. He hooked her legs over his shoulders, folding her in half, and drove down deep.
This position let him pound even harder.
Kpa-kpa-kpa-kpa-kpa!
"Your pussy is creaming so much… look at that messy cunt… taking every inch like a good girl."
Nezuko's eyes rolled back.
"Too deep… ahh… you're ruining me… nggnn…"
Zenitsu leaned down and sucked hard on her leaking breasts while jackhammering. Milk flowed freely into his mouth as he fucked her senseless.
He switched positions again; her on the edge of the futon, legs spread wide while he stood and pounded her. Then against the wall, her legs locked around his waist as he lifted and dropped her onto his cock repeatedly.
Every round had new details: slow grinding where he circled his hips deep inside her, fast shallow thrusts that made her tits bounce wildly, long strokes where he pulled almost all the way out before slamming back in.
"This milky pussy is mine… I'm gonna fuck you every night and drink these tits dry… you're my personal cumdump, Nezuko… say it."
Nezuko moaned, voice breaking.
" I'm your cumdump… ahhann… drink my milk while you fuck me… please…"
By the fifth round Nezuko was a trembling, leaking mess; tits swollen and sensitive, pussy red and overflowing with cum, body covered in sweat and milk. Zenitsu still wasn't done.
He laid her on her side, spooned behind her, and slid back inside. Slow, deep thrusts while he drank from her tits again, one hand rubbing her clit.
"You feel so good… I love fucking you… love drinking your milk…"
Nezuko came softly this time, whimpering. "Ahh… again… Zenitsu…"
Zenitsu finally reached his limit in the last round as he watched her riding him face-to-face, breasts pressed to his chest as he sucked one nipple and thrust up hard. They came together one final time, Zenitsu flooding her womb again.
They collapsed in a sweaty, milky, cum-soaked heap. Zenitsu pulled her close, kissing her forehead.
"I love you, Nezuko… I always have."
Nezuko smiled tiredly, curling against him, milk still slowly leaking onto his chest.
"I love you too… my thunderlord."