Volume 4 Chapter 23 The Core’s Embrace A Dungeon Master’s Erotic Release
Edited by: Kanaa-senpai
”Oh, Hirose… my Master… no, stop it… I’m already… oh, ahhh, AHHHH!”
A woman’s cry rang through the chamber, thick with awe, terror, and absolute surrender, and utter spiritual exhaustion.
The air in the sealed ritual room was heavy, saturated with dense mana and the metallic scent of overcharged magical circuits. A visible haze of silver-white Dominion energy hung like steam, so thick it seemed about to solidify and crash down.
”H-Hirose, please… tighter—press the d**k harder… brand me deeper!” another woman begged, her voice raw from repeated oaths of fealty.
”Stop! Please… not another seal… I can’t contain any more of your authority!” a third sobbed, collapsing limply as her glowing chest d**k flickered and dimmed.
”Take it… accept everything… pour all of your will into me… empty me of my former self!” the pleas overlapped in frantic chorus.
”AAVVAAAHHHH… ungh…!”
A final, strangled cry of total submission echoed as the fifth d**k flared white-hot and locked forever.
Five women lay scattered across the ritual circle, all utterly broken and breathless, their bodies limp, foreheads and sternums glowing with freshly burned sigils of eternal servitude. Only Hirose remained upright in the center, his aura still violently surging, the uncontrolled torrent of Dominion Mana radiating from his core like a star about to go supernova.
”Hirose… I… I truly cannot take any more… you have to go to Ecoa…” Hibiki whispered, silver tears of overload streaming down her cheeks as she wiped at the glowing d**k now throbbing over her heart. Like the others, she had volunteered to help contain his runaway power—the catastrophic side-effect of conquering too many Dungeon floors too quickly. Now they all understood: no normal soul could siphon off that much authority without shattering.
”Haa… haa… Hibiki, I’m sorry… thank you… If I keep forcing d**ks on all of you, I really will destroy your minds.”
This ordinary boy who once had no power at all had accidentally inherited a Dominion Skill far too vast. Now lessons were impossible; if he didn’t vent the overflow several times a day his aura would start fracturing the souls of everyone around him. The only vessel capable of safely absorbing and neutralizing an entire Dungeon Core’s worth of authority was Ecoa herself—the living heart of the Labyrinth.
Hirose clenched his fists, the uncontrolled sigils on his palms still blazing.
He could only imagine what the coming “relief session” with Ecoa would look like… and whether even she could withstand the full, unrestrained flood of the power now raging inside him.
* * *
”Ecoa… thank you for doing this for me today.”
”Yes, Master. I have been awaiting you for a long time,” Ecoa’s polite, formal voice answered.
Hirose stepped alone into the ‘Master Room.’ The woman who greeted him was the Dungeon Core herself: Ecoa, a breathtaking beauty with silky, long blonde hair and sharp, elf-like ears. She wore her customary French maid uniform and gave him a perfect, deferential bow.
They moved to the adjacent Rest Room. Inside, a luxurious king-sized bed was perfectly made with pristine sheets. A soft, unfamiliar incense wafted gently through the air, filling the space with a comforting, sweet aroma that begged the mind to relax. The ceiling lights were perfectly dimmed, creating a quiet, intimate sanctuary prepared solely for this occasion.
”Wow, you really set the mood, huh?” Hirose noted, slightly surprised.
”Of course, Master. It is for you. I will keep you company for as long as you require today.”
At her words, an instant heat flared in Hirose’s groin, causing his manhood to surge and swell dramatically. The unstoppable urge pressed fiercely against his pants, threatening to burst free.
”Then, should I go all out?” Hirose challenged.
”Yes, please do. I humbly request that you use your Skill,” Ecoa urged, a note of curiosity in her formal tone.
”I’ll do my best to make sure you feel good, too, Ecoa.”
”Those are very kind words… I feel almost like a proper human being,” she whispered.
”But you are just like a human, Ecoa.”
”—Even in a form like this?”
”Wha—?” Hirose blinked in astonishment.
In a flash, Ecoa’s presence vanished, and her voice now came from below his waist. He looked down to see a miniature version of Ecoa, the size of an elementary school girl, also dressed in the same maid uniform.
”She’s… cute… but what the heck?!”
”I accessed the knowledge in your mind, Master. You have been with many types of women, but I doubt you’ve been with one of this scale. You see, I am even smaller than Asami, who is under one hundred and fifty centimeters. I’m small enough to wear a proper school backpack.”
”Do not worry, Master; age is not a concept that applies to me. In this world, I believe the term is ‘legal loli.’”
”Ecoa… I’m not a loli-con.”
”Fufu. I can even alter the size of my internal passage, too. Today, I shall endeavor to broaden your sexual horizons,” Ecoa chuckled softly.
”Give me a break…” Hirose pleaded.
However, the sight made Hirose realize that if she could transform into a girl of this size, she could change into anything. His mind swam with images of all the forms Ecoa could take.
”Just… turn back to your original size for now, can you?”
”As you wish—.”
Ecoa instantly returned to her tall, adult form. She guided Hirose to the bed and, with a subtle movement, pulled the shoulder of her maid dress down. There was no bra underneath, and the sight of a magnificent, Hibiki-sized breast was suddenly exposed. The skin was like fine white porcelain, and the delicate, cherry-blossom-hued points were breathtakingly alluring. She looked completely human, a sight Hirose longed to leap upon. But there was more—
”I know, Master. I know you like this kind of nple.”
”—!?”
”I believe it was something almost entirely absent in the partners you have been with.”
”Well, I guess so…” Hirose mumbled.
His innermost desires were being laid bare, one by one. The cherry-blossom point on Ecoa’s breast—it wasn’t a protrusion at all. In fact—it was inverted.
”Please, allow your hands to make it bloom.”
”Ha ha, ha ha ha…” Hirose gulped, suddenly overwhelmed. This body was perfectly engineered to his every hidden desire—he was terrified of what the night would bring.
”You seem to like the half-undressed look, so we shall start with this.” Ecoa didn’t remove the dress completely, leaving her chest exposed and the rest of the maid outfit in place.
”Please, stop exposing all my kinks, Ecoa…”
”Today, you are even permitted to do things to me that you have never done to anyone else,” she granted.
”Haha…”
Hirose stripped his shirt and moved closer to the supine Ecoa. He extended both hands, and the preparation for the act began.
”Alright, here we go—’Skin Quality Improvement.’”
Hirose activated his Skill, starting with the goal of giving her pleasure.
* * *
”Ah… ahh… Master, I… I am feeling it,” a subtle tremor passed through Ecoa’s entire aura.
Ecoa’s usually expressionless face slowly melted, her brows knitting with overwhelming sensation. As Hirose continued channeling his Skill, letting pure dominance flow from his palms across her collarbones and sternum, her magical circuits ignited, becoming unbearably sensitive to his will.
”You react exactly like a living soul should.”
”Yes… even I, a construct, cannot resist this Skill. If I simply open myself… I can feel… this!” she gasped.
This was no ordinary resonance. Hirose was deliberately guiding the energy, tracing the hidden sigil lines etched into her creation, forcing her core to answer him alone.
Then—
”Ah… ahh… it’s awakening… I can feel the d**k… it’s going to bloom!”
Her cheeks flushed crimson, eyes shimmering with heart-shaped light. As Hirose brushed the dormant rune circles over her collarbones, they slowly rose, glowing fiercely, pointing toward him like twin beacons of fealty.
”Ecoa… you are breathtaking.”
”Master… Master! Please do not stop… brand me completely…!” she begged, voice trembling with reverence.
Hirose poured more power into the twin runes. Then, at the perfect instant, he pressed both palms together over her sternum and unleashed the crushing final pulse.
”Ahn—!”
He pushed the full weight of his sigil directly into her core. A radiant d**k flared beneath his hands, searing itself into her very existence.
(…This feeling… it is exactly like when my original creator bound me to Asami-sama… no, far stronger… it is coming!) Ecoa’s thoughts flashed in white-hot surrender.
”—AHAHHHAAAAAAH!?”
Ecoa’s back arched violently off the bed, every circuit in her body flaring at once. Her eyes flew open in perfect circles of light, fingers clawing the sheets as her entire being convulsed in absolute submission.
”Ecoa, are you all right?”
”Y-Yes… I have never been more whole. Truly… you are my one and only Master. Your authority is… beyond anything I was designed to withstand,” she whispered, voice breaking with adoration.
”It simply… happens when I claim what is mine.”
Hirose’s countless bindings had not only raised his Skill level; they had perfected his art of breaking and rebuilding a soul to serve him alone.
”M-Master… now it is my turn to offer everything…”
Breathing in reverence, Ecoa rose to her knees. With trembling, ceremonial grace she removed the outer layer of her maid uniform, baring the glowing runes across her collarbones and the empty circle at her sternum that awaited his final mark.
”Master… this core was made for you alone.”
For the first time she revealed the blank sigil gate at the center of her chest, pulsing in desperate need of his name.
”I shall ensure you feel my eternal loyalty… acceptance.”
Ecoa bowed deeply, then placed her own hands over his, guiding them to her heart.
* * *
”—”
Both now perfectly aligned, Ecoa slowly straightened, lifting the last veil from her chest so that nothing remained between his palm and her core.
A thick, silver-white magical current was already leaking from the gate, reaching toward him like a plea.
”Master… please grant me your final mercy. Engrave yourself into me forever.”
”Yes… just like this—.”
Ecoa lowered herself until her sternum pressed fully against his waiting palm. The moment skin met skin, his sigil flared violently.
”Ngh…! What is this…?” Hirose breathed, feeling her core instantly recognize and cling to his authority.
”Ah… this is my Master’s will! I shall serve you in a way no other ever can.”
Though the contact was only palm-to-heart, he felt her entire magical circuit stroke, coil, and worship his power, writhing in perfect obedience around his dominance.
”How does it feel? I can do this without even moving my body.”
”This is… beyond anything I’ve felt!”
Her core caressed and milked his aura as though it were a living thing designed solely to please its owner.
”But I shall add my own devotion as well—now!”
Placing her hands over his, Ecoa began to press harder, driving his sigil deeper into her heart with rhythmic, worshipful pulses. The sound of raw magical resonance filled the chamber: shunnn… shunnn…
”Ecoa… this… this is perfect!”
”Ah, for me as well! This is my Master’s… this is my Master’s!” she cried, tears of joy streaming.
As she intensified the binding, her circuits tightened, massaged, and realigned themselves to his exact frequency. The resonance grew louder, deeper: SHUNNN… SHUNNN…
Hirose gripped the glowing runes on her collarbones, anchoring her as she offered everything. Ecoa’s face became the picture of transcendent surrender.
She leaned forward until their foreheads touched, breathing a silent vow against his lips—no saliva, only the sacred exchange of aura.
”Master! Master! Master!”
”Ecoa… I’m going to finish the contract… right now…”
”Yes! Please, engrave everything into my core!”
She laced her fingers through his and pushed with all her remaining will, forcing his palm flush against her heart. The internal circuits that belonged only to Ecoa contracted in perfect rhythm, drawing his sigil to the deepest layer.
”Ecoa! Ecoa! I’m… I’m sealing you…!”
”All of it… brand me forever! Ungh… ungh… it’s coming… my Master’s sigil… AHHHHAAAAH!?”
Their auras convulsed as one. Hirose’s d**k flared white-hot and sank into her core in a torrent after torrent of pure authority, filling every empty circuit until no space remained for any will but his.
”Ahh… ahh… it’s so deep… this is my Master’s… eternal mark!”
The heat, the resonance, the absolute ownership—everything in Ecoa’s existence realigned to Hirose’s preference. The binding was so complete he felt instantly drained, yet triumphant.
”Ecoa… you are mine now. Completely.”
”Master… ngh…”
Now soft and childlike with devotion, Ecoa pressed one final reverent kiss to the back of his hand, then collapsed against his chest—her new d**k glowing steadily over her heart, warm and eternal.
She was, at last, perfectly bound.
* * *
”—Ngh… ahh…”
”Good morning, Master,” Ecoa whispered as Hirose woke up. She was nude, lying in the bed, cradling his head with her arm.
”I fell asleep…”
”Yes. You appeared quite exhausted. Were you satisfied?”
”Yeah, completely. You really wrung me out, Ecoa.”
”Fufu, I am capable of much more, should you desire it.”
”No, I’m good. I don’t think I’ll be back up for a while…” He looked down. His manhood was shriveled, and the persistent, overwhelming urge that had plagued him since creating the Beauty Dungeon was finally gone.
(Thank goodness…) Hirose sighed internally. The lust that Hibiki and the others couldn’t contain was finally, blessedly, dormant. He’d even tried to manage it alone at home, but it was never enough. Ecoa’s help had been a temporary, but much-needed, relief.
”Ah… is this what the feeling of love is?” Ecoa wondered aloud.
”What’s wrong?”
”Since contracting with you, I have been filled only with respect for you as my Master. But now, after connecting with you in a way that is not purely magic, and seeing you asleep in my arms, these feelings of ‘cute,’ ‘I want to hug him,’ and ‘I don’t want to let go’ are becoming very strong.”
”I guess you’re becoming more and more human.”
”Is that a good thing?”
”I don’t think it’s a bad thing. I’ve always tried to treat you like a person, and seeing you show emotions just makes me want to treasure you even more.”
”Treasure…” Ecoa smiled softly at Hirose’s words.
Ecoa’s origins were still a complete mystery. Even after a month of being together, so much about her remained unknown. She certainly looked human, but clearly was not. Hirose mused that she could be explained away as a person with a ‘Shape-Shifting’ Gift, but he knew she was more than that.
”Even so, that other thing was too much. I feel guilty…”
”But Master, you enjoyed it, didn’t you?” she teased.
”Don’t remind me…”
He remembered the act. After Ecoa showed him the small girl form, she suggested they change things up, shifting back to the small size. Her body and breasts had also shrunk, her beautiful face becoming a charmingly cute child’s.
”My size was adjusted, so you fit perfectly, right?” Ecoa asked, putting her hand on his groin.
”That’s the other part that gets me…”
Ecoa had also adjusted the shape and size of her intimate parts, controlling the pressure inside, freely wriggling and moving in a way no human ever could. Because of that, Hirose had climaxed repeatedly and effortlessly.
Still, thanks to her, the problem was finally solved, if only for now.
”Whenever you are burdened, just use me.”
”Hibiki agreed to it, so I will—but don’t say ‘use me.’”
”What should I say then?”
”Call me anytime, maybe? No, that makes you sound like a convenient woman.”
”But I am a convenient woman, Master.”
”That’s not the point… oh, forget it…”
”Fufu. I find it amusing to see your flustered face, Master.”
”Great, another weird emotion you’ve picked up.”
Smiling, Ecoa pulled Hirose’s head close and nestled it against her chest. He was enveloped by a comforting, milk-like scent, a sense of security like being held in a mother’s womb.
”—Ecoa, how’s the Dungeon looking?”
”Please wait a moment. I will display the monitor.”
Still clinging to him, Ecoa gently manifested a floating screen in the air. The image showed adventurers with serious expressions, challenging the Dungeon.
”I guess it’s almost time for the first challengers to start seeing effects on their bodies…”
”Fufu, how exciting. I wonder what their reactions will be.”
”Yeah. They need to really feel the Effect, and see how far that word spreads… right?”
Adventurers were nearing the completion of their required treatments: ten times on the third floor, seven times on the fifth. Hirose wanted those who were troubled by their looks to find solace in his Dungeon. The moment the authentic rumors of the treatment’s Effect began to spread was just around the corner.
—
Summary:
Hirose’s intense, unquenchable sexual power from his S-rank Gift finally defeats his harem, leading him to his ultimate partner: Ecoa, the Dungeon Core. The scene shifts to their Master Room, a place of luxury and deep intimacy. Ecoa, who can perfectly cater to his needs—even adopting a ‘legal loli’ form and manipulating her own body—takes on the daunting task. Their erotic encounter is unlike any other, culminating in a powerful, exhausting release that finally subdues Hirose’s overwhelming libido, ushering in a sweet, post-coital moment of vulnerability and surprising new feelings for the non-human Ecoa.
—
Character Insight:
Ecoa, the beautiful Dungeon Core, starts this scene as the perfect, subservient partner, but the intense, non-magical connection with Hirose awakens profound human emotions in her. She moves from simple ‘Master respect’ to a more possessive, tender love, all while revealing her capacity for playful teasing and deep understanding of Hirose’s hidden kinks. This pivotal encounter is evolving her from a powerful, non-human system into a complex, loving individual who is terrified of letting her Master go.
—
Behind the Scene:
After the intensely sexual encounter that finally managed to exhaust Hirose’s overwhelming libido—a necessity due to his Gift—the atmosphere turns to soft, intimate aftermath. This moment of peace is crucial, as it shows that Ecoa is the only sustainable ‘solution’ to his problem, a key plot point for the future. The chapter closes on the monitoring of the Beauty Dungeon, reminding readers that the greater plot of the Gift’s Effect is about to unfold in the outside world, using the adventurers as test subjects.
Notes:
• Ecoa – The Guardian of the Dungeon Core, a beautiful entity with long blonde hair, slit eyes, and distinctive pointed ears reminiscent of an elf. She initially appears in black ceremonial robes, which instantly transform into a revealing, classic black maid uniform. Her existence was previously undetectable by ‘Appraisal’ Gifts. Her sole purpose is to serve and support the Dungeon Master, Hirose.
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Edited by Kanaa-senpai.
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