7:20 PM, nighttime
Ubuyashiki Mansion
After a dinner worthy of a noble household, Tanjiro and Mitsuri lay sprawled on the tatami, stomachs finally full.
Mitsuri had eaten three times more than Tanjiro, yet her belly stayed perfectly flat. She could probably have kept going if another tray had appeared.
She had bathed before the meal and changed into a simple white yukata. The fabric clung to her curves far more than her earlier outfit, leaving very little to the imagination.
"Kya! I'm so full! That meat was the tastiest thing I've ever had. I've never eaten anything this good back in the western prefecture. Haa… so satisfying…"
She rolled onto her back with a blissful sigh, rubbing her stomach and beaming like the world had never been kinder.
Across the spacious room, Tanjiro had already spread out his soft futon after finishing early. He lay on his side, quietly enjoying the view.
Mitsuri had insisted on eating together, so he had let her eat in his room to keep her company while she devoured plate after plate. Even the quiet maid clearing the dishes had stared in stunned silence at the mountain of empty trays.
Now, with only the two of them left in the lit room, Mitsuri finally glanced toward him, still glowing with happiness.
"Tanjiro-kun, thank you for accompanying me. Hehe, I always eat better when someone's with me!"
She smiled brightly, completely unaware of how the loose yukata had slipped a little at the collar, revealing her enormous cleavage.
Tanjiro just smiled back.
"No problem at all, Kanroji-san. I'm also kinda used to eating with my siblings, so having you by my side was a relief. Hm, now that I think about it, I wonder if they're doing alright without me…"
Mitsuri's eyes brightened almost instantly.
"Siblings? How many? I have four younger siblings back home too, and I'm the oldest one, fufu!"
Tanjiro folded the blanket over his body, relaxed his head down, and answered.
"Heh, I'm also the oldest among my five other siblings: two sisters and three brothers. Currently, they're staying at a place called the Butterfly Mansion. I'll introduce you to them tomorrow."
Mitsuri nodded enthusiastically. "Mm!"
After spending some time conversing, she started to take her leave.
"Good night, Tanjiro-kun," she yawned slightly. "Wah, I'm so sleepy~"
"Good night. And from tomorrow on, it's Tanjiro-san, heh, my disciple."
He smirked, giving her a teasing look.
Mitsuri's teaching and training duty had been officially assigned to him earlier, so starting tomorrow he would be her teacher.
It clicked in her mind instantly.
"Mooh!" She pouted with a funny face and slid the door shut. "I know that, moh…"
Her faint voice echoed from the hallway.
Tanjiro shook his head with a chuckle.
'What a charming girl, heh. She's fun to be with… and easy to tease… Although the mission… well, it will take time. I can't just rush it…'
….
At the same time
Butterfly Mansion
After dinner with her younger siblings, Nezuko slipped out to the narrow balcony on the second floor. She leaned on the railing, gazing at the faint outline of the moon behind thick clouds.
The cold night air didn't bother her; it was nothing compared to the mountain winters back at her home.
Her thoughts drifted to yesterday, to that long, burning kiss with her brother.
Her heartbeat quickened on its own. Heat rushed to her cheeks as she pressed her lips together, remembering his voice.
'Nezuko's lips belong only to Onii-chan…'
A shy, dreamy smile spread across her face.
No matter how anyone looked at it, she was a young girl whose heart had been completely stolen by her Onii-chan.
She couldn't stop replaying that kiss, especially at night. Even her dreams kept looping the same moment, like a broken record.
'…Ahh, Onii-chan~'
She clutched her yukata collar tightly, cheeks burning. 'I miss you already…'
Suddenly, a soft, teasing voice floated from above.
"Ara~ Nezuko-chan, are you missing your Onii-chan so much you can't sleep?"
Nezuko jolted, spinning around.
Perched silently on the roof like a ghost sat a petite young woman with black hair tipped in purple. She wore a calm, closed-eye smile, but the teasing glint was unmistakable.
She was Kocho Shinobu, master of the Butterfly Mansion, the Corps' only researcher, and the newly appointed Insect Hashira, being admired by everyone to attain such rank despite her small stature.
"Kocho-san…! You scared me!"
Nezuko pressed a hand to her racing chest and pouted, half-angry, half-embarrassed. Her heart was already pounding from thinking about Tanjiro; the sudden surprise by Shinobu sent it into overdrive.
"Ehh~ that wasn't my intention… but seeing a scared Nezuko-chan is quite a treat for my eyes too, kuku…" Shinobu teased playfully.
Noticing Nezuko still pouting, she added a few soft, silly words.
"Nezuko-chan, please forgive this big sister~"
Nezuko's lips twitched upward.
"Alright, since Kocho-san is asking so sincerely, I'll forgive you… But!"
Shinobu curiously tilted her head.
"But…?"
Next, Nezuko flashed a clever smile.
"But, Kocho-san has to tell me everything about herself and Kanao-chan. Not a single thing left out. Hehe."
Shinobu's eyes had a glint of surprise before she let out soft, melodic laughter, hand covering her mouth.
"Haha, was that all you wanted? Ha…"
Nezuko nodded expectantly.
Shinobu leaned forward with a warm smile and whispered,
"Ho… but it will take a long time..."
Nezuko shook her head lightly.
"I'm not sleepy at all today anyway, Kocho-san. Please…"
Tapping her lip thoughtfully, Shinobu then said softly,
"Why don't we go to my room and continue talking over tea and cookies? Would that be okay with you, Nezuko-chan?"
Hearing her answer, Nezuko's face lit up.
"Yes, yes! Let's do that! Thank you, Shinobu-san!"
Shinobu's eyes curved into gentle crescents at the cute response.
For some reason, this girl reminded her of her own Nee-san… or rather, of her past self.
Even though Nezuko had only arrived with her siblings a few hours ago, Shinobu already found her more and more endearing.
'I wonder how her Onii-chan, Tanjiro, is doing… He killed a Lower Moon on his very first day, and even Giyu-san was no match for him… How interesting~'
....
Back in Tanjiro's room
Tanjiro lay inside the futon with only his head out, eyes open. He could clearly sense the twelve human life signatures scattered throughout the huge mansion, plus Kie's distinct demonic presence.
'Hm… Amane and her quintuplets, Mitsuri, head maid Koyuki… that's eight. The other four must be servants.'
Staring at the ceiling, his mind and body finally felt light and at peace.
Tonight, for once, he could actually rest.
'Muzan… he probably won't show his face for at least a century. Which leaves me one real option: hunt him down. But he has that dimensional castle to hide in… Nakime's Blood Demon Art. Heh, it would be nice if I could turn into a demon myself, but my body is basically a walking sun. The demon DNA in Kie's milk got incinerated the moment it went down my throat… Even if I drank her blood directly, I'd probably burn it all away too. Hah… Yoriichi's body is just too damn overpowered. I'd need a ridiculous amount of Muzan's blood for even a ten-percent chance…'
Surrounded by silence, his thoughts drifted calmly.
TU—!
The basket lid suddenly lifted from the inside.
'Hmm…?'
Tanjiro glanced sideways.
The basket toppled over, and Kie crawled out on all fours.
With half-lidded eyes, she located him.
"My boy…"
She moved slowly, like a sleepy cat.
Slipping under the futon, she immediately wrapped herself around him, pulling his head toward her overflowing chest.
"Hungry?" she murmured, gently patting his head.
Feeling her warmth, Tanjiro let out a quiet hum.
"Hm…"
Kie drew him closer and loosened the clean robe he had put on her that morning.
Right before his crimson eyes, her mesmerizing breasts spilled free, releasing that same mind-numbing, sweet scent of milk.
A notification chimed beside his ear.
[𖤐 Mission: Milk Mommy for 3 hours]
[𖤐 Reward: Explosive Growth]
Tanjiro ignored the panel completely and let himself drown in Kie's motherly affection.
'This addiction is going to be the death of me… hah.'
He caught her nipple between his lips and began drinking deeply, savoring the rich flavor with quiet devotion.
....
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30 chapters already!