Forbidden Honeymoon: Reincarnated as a Slime, Yet I Can't Let Go of Her Fingers
Rimuru, a second-year high school student, is suddenly reincarnated as a slime.
He wakes up in a deep, dark dungeon room. His body is blue and translucent, with no limbs. He can't speak properly. Milene and Chloe, female adventurers who hunt monsters, find him.
They casually tame Rimuru as a 'cute slime.' As they travel together, Rimuru's role becomes not about fighting... but about what happens inside the tent at night. Milene and Chloe begin to unleash a sticky, possessive desire onto the sl
Forbidden Honeymoon: Reincarnated as a Slime, Yet I Can't Let Go of Her Fingers - The Sin of Body Heat — The Wound of a 14-Year-Old and the Night of Blue Jelly
The guild's quest board was a chaotic swarm from early morning. Mid-rank adventurers in leather armor jostled and craned their necks, snatching glances at the new postings. Their voices and footsteps echoed through the stone hall, setting the very air abuzz.
Mirene pressed a hand firmly against the pouch at her chest, her brow furrowed. Through the fabric, her palm felt the cool, gelatinous form of Rimuru.
"Packed again today."
Her low murmur held none of her usual brightness. Her burning amber eyes fixed on a male adventurer standing before the board. He glanced—just briefly—at the pouch on her chest. It was not her imagination. That gaze had definitely been aimed at Rimuru.
*Squeeze.*
Unconsciously, Mirene clenched the pouch tighter.
(*I won't let anyone—see him.*)
Her heart gave a heavy thud, and her fingertips went cold. She knew perfectly well this feeling was jealousy. But she couldn't suppress it.
"Mirene, I don't think you need to hide him quite that much."
A quiet voice came from behind. Turning, she found Chloe standing there with an anxious expression, her silver bobbed hair catching the light. Her deep blue eyes were fixed intently on Mirene's hand, clutching the pouch so tightly.
"This is fine. Bringing a slime on a quest is against the rules, after all."
Mirene immediately manufactured a smile. Her usual dependable, big-sister face. But Chloe sensed something darker lurking behind that smile, and a disquiet stirred in her chest. She opened her mouth to say something—and in the end, closed it again.
Inside the pouch, Rimuru kept perfectly still.
(*Mirene's body heat—it's speeding up.*)
Through his slime senses, the change in her heartbeat transmitted directly to him. Even through the cloth of her clothing, he could feel the heat of her skin and the quickening of her pulse as clearly as if they were his own. The hostility she'd felt toward that male adventurer, the possessiveness that had nearly surfaced—all of it.
(*This is jealousy.*)
Rimuru's feelings were complicated. To her, he was supposed to be nothing more than a pet. And yet this attachment—was this person okay?
But more than that.
(*Because of me, something is starting to break.*)
An invisible fissure running between Mirene and Chloe. And at the center of it was a blue slime who couldn't speak.
Before long, the two of them headed for the second stratum of the Labyrinth of Lamentations. This dungeon, sprawling beneath the Great Fault Mountains, was the ruin of a civilization that had perished in ancient times. Pale blue magical essence seeped from the walls, faintly illuminating the stalactites. With every step they took, the cold sound of dripping water echoed through the passageways. The air was cool and crisp, yet laced with a strangely sweet, decaying scent.
When they emerged into an underground waterway, the path split three ways.
"Damn it…"
Chloe unfolded the quest parchment. But the paper, half-blurred and ruined by the waterway's humidity, rendered the crucial fork in the map completely illegible. Her blue eyes clouded over, deeper and darker.
"We might be better off turning back. If we get lost here, we won't be able to return."
Her voice trembled. They both knew all too well how dangerous it was to lose one's way in the labyrinth. At worst, their water and food would run out, and they would die without anyone ever finding them.
"Wait a moment."
Mirene took Rimuru out of the pouch. His cool, gelatinous body quivered softly on the palm of her hand.
"Rimuru. You were looking at the quest board earlier, weren't you. Do you remember—?"
Rimuru exhaled deeply in his mind.
(*Let's see, it was—*)
Within his gelatinous body, golden points of light began to stir. Those points of light, which engraved information into him, were Rimuru's very memories. As he recalled the map from the quest posting he'd seen at the guild—the complete image, unmarred by water—the points of light gathered and began to take shape.
His body trembled and transformed, a small map rising to the surface. The central route at the fork glowed with a faint golden light.
"Huh…"
Chloe caught her breath. Her blue eyes widened, a pale light kindling in their depths.
"You… remembered all of it?"
Her voice shook. This time, not with fear. With wonder.
Rimuru couldn't produce words. But he quivered his body slightly, imbuing the motion with affirmation.
Chloe crouched down in front of Rimuru and gazed at his translucent form. Tears welled up, making the lake-like blue of her eyes even paler, more transparent.
"…You don't even have words. And all this time, you've been supporting us."
Her right hand gently touched Rimuru's body. Her fingertips sank just barely into the cool jelly. That sensation felt more precious to her now than it ever had before, and Chloe felt a warmth slowly spreading through her chest.
(*I always thought I was completely useless—but Rimuru wasn't just silently listening to my complaints.*)
(*He was doing something like this. For us.*)
It was the moment Chloe's feelings toward Rimuru began to change, audibly, irreversibly.
As for Mirene—a satisfied light dwelled in her amber eyes, as if to say *I knew it*, and a smile played at the corners of her mouth.
"You really are special, after all."
She gently stroked Rimuru with her palm. The touch was tender, but at the same time, Rimuru sensed the possessiveness inside her sinking its roots even deeper.
(*I'm happy—but I'm scared.*)
Rimuru's golden points of light flickered, tinged with crimson for just an instant.
Thanks to the map Rimuru had memorized, the quest was completed without incident. They exterminated the six cave spiders nesting in the second stratum and recovered the three rare silk cocoons the client required. Mirene's flame-heat manipulation—her Stigma ability—wiped out the swarm of spiders, while Chloe's spatial perception prevented ambushes from blind spots. Rimuru could do nothing but watch from the pouch, yet the sight of the two of them fighting desperately etched itself deep into the points of light within his body.
In the evening, they returned to the safe zone of the second stratum.
It was a stone hall where few other monsters ventured. The ancient ceiling lights flickered pale blue, and the warmth of a campfire finally allowed them to feel human again. From a corner of the hall, the quiet sound of distant underground water echoed.
"Phew… we managed somehow today, too. Chloe, sorry, but could you go fetch some water? I want to rest a bit."
Mirene spoke. Her voice sounded tired, but Chloe didn't notice.
"Of course. I'll be right back."
As she disappeared into the passageway, only Mirene and Rimuru remained in the safe zone. The orange light of the campfire flickered.
Mirene let down her long crimson hair and, without a word, spread out her sleeping bag.
"…Come here."
The hands that lifted Rimuru were trembling. Not just from the campfire's heat.
She slipped him inside the sleeping bag, and the moment she pressed him tightly against her chest, waves of body heat transmitted directly into his gelatinous form. Through the fabric of her clothes, the softness of her skin and the throb of her heartbeat pressed against him, intimately close.
(*Again—*)
Rimuru's body quivered, independent of his will.
Her body heat felt terrifyingly good. His slime instincts screamed to seep deeper into that warmth. Even as his reason sounded warnings, his body began, of its own accord, to cling to her skin.
(*Stop it—me.*)
"Rimuru, I want you to listen."
Mirene's voice changed. It wasn't her daytime, big-sister tone. It was sweet, and yet held a note of something almost mad.
"When I was fourteen—I lost my entire family."
A single tear spilled from her amber eyes. Lit by the campfire, it gleamed gold like a jewel.
"My father, my older brother, and I—the three of us were delving into the third stratum of this labyrinth… and I was the one who said, 'I'll be the decoy.' I thought it would be fine, because I could use my Stigma—"
Her voice broke off. She tried to draw a deep breath, and a sound like her throat seizing escaped her.
Rimuru understood. Her memories were pouring out all at once, like a dam bursting.
(*Her fourteenth year—*)
A searing, burning heat.
A young girl hidden in the shadow of a rock.
Because she had acted as the decoy, the horde of monsters—had surged over her father and brother.
She alone had survived.
In that instant, the Stigma crest had risen to the surface on the back of her hand.
The power of flame-heat manipulation was not meant to protect her family. It was a curse born at the very moment she lost them.
"Because of me, everyone died…"
Her tears soaked into Rimuru's gelatinous body. To his slime senses, it was the same as the taste of salt, and the raw, vivid transmission of the pain from the eight-year-old wound deep in her heart.
(*Ah, so that's it—*)
Rimuru finally understood.
This person had been carrying this guilt alone all this time. Unable to tell anyone, living a lie of strength. Believing that her very presence beside someone—bearing a Stigma—might be another curse.
"That's why I will absolutely never let you go. I don't want to lose anyone ever again—you belong only to me."
The strength in her arms intensified. Rimuru's body was pressed hard against her chest, his form deforming slightly. Her body temperature, elevated as a side effect of her flame-heat manipulation, warmed his gelatinous form like a fever.
(*I, too—*)
Rimuru's heart clenched tight.
(*I, too, lost my family in my previous life.*)
The memories from when he was a second-year high school student—most of the details had faded. But the sense of loss alone remained, stark and clear. He had lost the place where he belonged—and that pain overlapped with Mirene's loneliness.
But.
(*As I am now, I can't do anything for her.*)
He couldn't produce words. He had no arms to embrace her back. He was nothing but a slime—a monster's body, capable only of receiving her tears.
And yet.
His body—wouldn't stop.
Rimuru's instincts as a slime had fully awakened. As if sucking at Mirene's body heat, his gelatinous form tried to permeate deeper and deeper into her skin. It seeped gradually into the valley of her breasts, seeking stronger, closer contact. The tremor of her heartbeat directly shook the golden points of light deep within his body.
(*No—this is wrong!*)
His reason screamed.
(*I'm just a pet, this isn't a normal relationship—what this person wants from me probably isn't love, it's just possessiveness—*)
(*And yet, my body—*)
Rimuru's body had completely surrendered to her warmth. He clung to her of his own accord. As if to heal her loneliness—no, that wasn't it. This was nothing but pure desire.
Caught between the emotions of his human past and the instincts of a slime, Rimuru's ego felt as though it was being torn apart.
The golden points of light inside him began to blur messily into red.
"…You don't hate me either, do you."
Mirene had noticed Rimuru clinging to her. She murmured softly, her voice still wet with tears. Her words were tinged with something like relief, like happiness.
(*I don't hate you—but!*)
Rimuru shook his head internally.
(*It's not that I hate you. But whether this is love, or desire—I don't know.*)
The fear of losing sight of that boundary was something he had never tasted before his reincarnation. Human ethics, his position as a pet—everything dissolved into gray. As if he himself, like jelly, was losing his form.
Self-loathing, and yet the instinct to seek her warmth. The two contradictions clashed inside Rimuru, and the golden points of light bled a deeper red.
Then.
Footsteps sounded in the distance. The faint echo of Chloe's boots, returning from the water source.
"—Sorry, Rimuru."
Mirene's expression tightened in an instant. She swiftly took Rimuru out of the sleeping bag and placed him gently beside the campfire. The movement wa
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