Demon Lord: Erotic Adventure in Another World-Chapter 517: An uneventful day...?

Asmodeus didn't feel everything was over, although Serena managed to seal Mephisto; he couldn't help but doubt it. The battle and dangers he struggled through for the past year, soon he would reach his next birthday...

Yet as he rolled the black box in his palm... He couldn't help but remain uneasy.

"Is this really the end, Serena?"

"Mmmn?"

The makeshift bedroom full of several women's scents remained quiet with everyone sleeping. Tired. Spent after completing their arduous tasks, now all that remained was to start building the nation, which would accept any race that accepted their laws and views.

Grigor's army pulled back, with Alan remaining at the outpost village, ready to head south in case the mainland humans invaded, as expected.

"It should be, this box is something that I obtained in return for becoming a mortal. Hnnngh~ ack, my back..." Serena's body, no longer a divine creation, suffered aches and pains just like a normal beastkin, and even her taste and sense of smell caused her to suffer.

"Does it hurt?"

"Nn... my back feels stiff~ can't you massage me, Ryuji?"

Asmodeus placed the box on the table beside him. Its surface was colder than before. Not cursed, not enchanted, just… wrong. A stillness that didn't belong in the world, like the air refused to breathe too close.

His blue eyes lingered on it for a moment longer before finally looking back at the woman who curled up lazily under the light blanket beside him.

Serena's silver hair splayed across the pillows, her nine remaining tails twitching with each stretch. She looked peaceful… in a way that almost frightened him. Fragile. Her usual glow was gone—no subtle divine pressure, no soft hum of presence. Just warm skin, shallow breaths, and the scent of fox and crushed petals.

"I never thought I'd miss your holy aura," he muttered.

"Liar," she teased, shifting her weight with a little grunt. "You always liked me better when I was soft."

"I liked you when you were terrifying."

"...That too."

She smiled, but didn't open her eyes. Her hand found Ryuji's under the covers, fingers brushing over his wrist with slow, sleepy affection. Her thumb pressed against his rougher calluses, pausing at an old scar near his thumb she'd always been fond of tracing.

"I don't regret it..."

"Even if my back's a nightmare and I can't fly anymore."

Asmoeus rolled forward and leaned over her body with a low groan. His hand slipped inside her loose robe and caressed her lower back. He pressed down his thumb and stroked the place where her spine dipped gently.

"Here?"

"Mmmn… lower... a little more... ah—right there."

Her voice dropped into a soft, breathy sigh as he worked his fingers slowly into the knots along her back, her muscles taut and unfamiliar. Beastkin fatigue. Real pain. Real nerves.

Serena's body twitched slightly under his hand, one of her tails coiling loosely around his waist as if clinging on instinct. The skin beneath his fingers was warmer now, flushing with the heat of touch, and it struck him again just how mortal she'd become.

No healing pulse. No golden recovery light. Just soft muscle and quiet winces.

"Haaah… you're good at this…" she whispered, voice thick with pleasure and fatigue.

"I was always good with my hands," Asmodeus replied, dragging his thumb in slow, steady circles down her lower back, where the pressure made her hips shift. "You just never let me prove it."

"I had godly tolerance. Not anymore…"

He chuckled under his breath.

"Do you hate it?" he asked.

Serena was quiet.

One of her hands reached up and brushed her fingers through her hair, as if trying to fix what no longer shimmered. The strands were just gold now. No longer gold-threaded light.

"I hate how I can't float."

"…That's fair."

"I hate how I smell everything more strongly now. And how sugar tastes ten times stronger."

"So now you know why I watered down your tea."

"You bastard."

Another chuckle escaped him.

"But I don't hate waking up beside you. Not like this."

He stopped.

Her words lingered in the warm space between their breaths.

Serena opened one eye slowly, the red of her iris dim in the dark—but still fierce in that quiet, grounded way that only she had.

"You're still tense," she murmured.

"I'm not."

"Ryuji."

"…The box is still here."

"I know."

Her hand reached back, tracing his jaw with her thumb, still half-buried beneath the sheets.

"But you're here too."

And that was the only thing that mattered right now.

The former goddess became more approachable since losing her divinity, but another large change was something else...

"Haaan~ that... wait..."

Her libido.

And Sensitivity.

Asmodeus let out a quiet sigh against her back, the hand kneading her hip pausing just long enough to feel her twitch under his palm.

"You're sensitive."

"It's awful…" Serena whimpered, her body shifting again beneath him. Her tails curled tighter, brushing against his side. "I thought it was just during the pregnancy, but even my ears are—ah…"

He stroked the base of her tail, not intentionally, just shifting position.

She let out a choked sound.

"See?!"

He smirked. "That wasn't even on purpose."

"You touch me like that again and I'll get pregnant again."

"That's not how it works."

"It might be with you."

He leaned down, pressing a kiss between her shoulder blades, where her fur gave way to warm, flushed skin. Her breath hitched. Not divine. Not a goddess. But still his Serena.

Still annoying. Still too clever.

Still, the woman who stood between death and the world, without a crown on her head.

"I'm worried," he murmured against her skin.

"I know," she whispered.

"I keep thinking I'll wake up and the box will be open."

"It won't."

"You're sure?"

"…No."

They stayed like that for a few breaths, quiet settling again around them like a blanket. Outside, Asmodeus could hear wind brushing against silk curtains. Someone was snoring softly—probably Sariel.

His hand didn't leave her lower back, but it softened, no longer kneading—just resting. Grounded.

"You'll help me build it, right?" he asked.

"The kingdom?"

He nodded, even though she couldn't see it.

"Of course," she said. "That's why I became mortal."

"…To rule with me?"

"No. So I could kick you in the ass when you overwork yourself."

He laughed again, low in his throat.

"I missed this," he said.

Serena rolled over, her hand finding his.

"Then don't miss it again."

The moment her dress slipped down, he couldn't help but gasp... her heavy breasts hung lower, swaying and a size larger than before and tips leaking a faint milky fluid. His crotch throbbed beneath her hips as Serena's eyes narrowed, her eyes like curved slits.

"Oho... are you aroused by my body?"

Asmodeus's azure eyes traced the curve of her body, changed, softer, fuller. Not divine anymore, but undeniably beautiful in a way that hit differently now. Raw. Honest. Earthbound.

And tempting.

"…You got bigger," he muttered.

Serena arched a brow, her smirk blooming like a wicked little vine. "So did you."

Her hand slipped beneath the sheets, tracing the outline of his thigh. Her fingers were slow, teasing, gliding upward—not as a goddess this time, but as a woman who knew exactly how to make her man squirm.

"Sensitive," she whispered, mocking his earlier words. Her thumb brushed across his stomach. "Still holding back?"

"I'm trying to let you rest," he said through gritted teeth.

She leaned closer, her silver hair falling forward like liquid silk. "Then why are you twitching?"

He didn't answer.

Couldn't.

Serena's hips lowered, fully straddling his waist in a calm, confident motion, she set her weight down with a quiet hum. Her body was warmer than usual, maybe from the pregnancy, or perhaps it was the current situation.

She flicked her tails, curling them in anticipation, swaying her chest letting her tits slap together as a drop of milk dribbled from the tip of one nipple, catching the morning sunlight through the curtain.

"...Don't make that face," she whispered before lifting his chin with her fingers. "I said I don't regret it. That includes this body and this heat, too."

His eyes flicked down, then back to her face.

"You're not tired?"

"I'm exhausted," she admitted with a quiet smile. "But I've wanted this. To feel everything. With you. Only you."

Her voice dropped to a hush.

"And right now… I just want you inside me."

Asmodeus let out a slow breath, his hands sliding to her hips, gripping tight, reverent.

"…Then take it."

Serena leaned in, her lips brushing his.

"I will."

Serena lowered her hips.

Slowly. Carefully.

Her breathing stopped the moment his tip pressed against her entrance—a tight, pulsing heat already trembling from the buildup. There was no barrier to power now. No divine protection. Only a tender, nervous wetness, and the twitch of unfamiliar nerves. Her thighs quivered on instinct.

"…Wait," she whispered, her voice cracking.

He froze, hands steadying her hips. Her tails twitched violently, coiling behind her like startled serpents.

"It's… really sensitive…"

Her face flushed red to the roots of her silver hair.

Asmodeus's azure eyes narrowed with restrained hunger. He could feel it—how her walls fluttered and squeezed just from the tip resting against her folds. A tight, shuddering pulse, drenched and trembling.

"I haven't even entered."

"I know—!"

He leaned up, kissing the side of her neck slowly. "Serena…"

Her hips moved on instinct. Just a little. Just enough.

And then, he pushed in.

Her mouth fell open, no words escaping.

Only sound.

"—AaAAHhhnn!!~"

Her entire body tensed. The stretch, the sudden invasion, the heat flooding her spine—it sent her tails flailing and her nails clawing at Ryuji's shoulders. Her cunt gripped him like a vice, impossibly tight and already spasming with every breath she fought to take.

He didn't slam.

He sank.

Deeper. Inch by inch.

Every second, her back arched, her eyes rolled, her lips trembled with moans that turned breathless.

She was tighter than before.

Smaller inside.

Asmodeus grunted, jaw tightening as her inner walls fluttered and squeezed with a panicked, obscene rhythm. Her insides clenched like they didn't know how to handle it—her body too sensitive, too raw, a virgin again in all the worst, most addictive ways.

Serena sobbed into his neck, hot and helpless.

"Y-You bastard—ahhh—y-you said slow—!"

"I am," he growled, pushing another inch deeper. "This is slow."

"No—haaaa—haah—this isn't fair…!"

She shook above him, milk leaking from her breasts again, staining his chest as her thighs tried to close. Her belly twitched. Every heartbeat made her walls clamp tighter.

He kissed her.

And then—

He thrust.

Not all the way—but deep enough to make her scream.

"AHHHNnnn—!"

Her entire body convulsed. A wave of heat rushed between her legs. Her walls locked down on Ryuji so hard he groaned through clenched teeth, hips twitching as her insides fluttered around him like never before.

Her breath stuttered. "T-Take it slow—"

"Okay~ I will."

The warmth of her insides calmped down, sucking on him as he closed his eyes in delight.

However, on the table nearby, the black box, which sat cold and still, suddenly rocked.

Then—

Gone.

Not cracked.

Not fallen.

It just vanished.

And neither of them noticed.