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Eight days and nights had passed.

Since time moved faster inside the aquarium, with one full cycle lasting eight hours, that meant about three days had gone by in the real world.

The fact that Siwoo and Deneb were still stuck inside the aquarium meant they still hadn’t managed to take out the Kraken in a single hit.

It also meant that today marked their ninth round of honeybee-style sex.

Their daily routine was painfully predictable.

As soon as the day phase began, Siwoo recharged Deneb’s mana, depleted from the previous cycle.

Then for the rest of the day, she scribbled away, trying to fine-tune her poison formula for maximum efficiency.

Come nightfall, she’d strike at the Kraken with everything she had.

And that was it.

It felt like being stuck in a never-ending raid, one where if you didn’t kill the boss before time ran out, you just reset and did the whole thing over again.

And the loot drop, in this case, was a creampie.

Truth be told, Deneb’s magic had gotten insanely stronger compared to when they first started.

The real issue was that starting from the fifth night, the Kraken had completely stopped coming up to the surface.

At first, the Kraken had charged like it was ready to tear them apart, but now it seemed to realize they weren’t prey anymore.

And neither Deneb nor Siwoo had a good answer to that.

The thick ocean water acted as a near-perfect buffer, dulling Deneb’s magic, and in that watery domain, the Kraken’s regeneration was downright monstrous. It easily withstood every one of her attacks.

“Haa...”

Siwoo sat there, pants off, absentmindedly playing with his cock.

He didn’t let Deneb catch on, but the thought of the people waiting outside was starting to get to him.

Amelia, the twins, Sharon... maybe even his master, if she’d come back—they all had to be worried sick by now.

He’d left behind just one note, then vanished for three whole days. Of course they’d be freaking out.

But that wasn’t even the biggest issue.

The mana recharging itself wasn’t the problem.

Siwoo’s special tool did the job just fine, with no side effects, and they’d both gotten used to this weird, functional kind of sex. It had become mechanical—quick and dull.

At best, it lasted a minute.

He’d barely slip inside before cumming, and Deneb could pretty much predict his climax down to the second.

But he felt his desires growing harder to control.

Unlike the last time, when he unconsciously gripped Deneb’s breasts tightly, he hadn’t done that again, but having to ejaculate and pull out right after insertion was becoming torturous.

He figured it was because he’d been breathing in her scent way too much through all this.

His body had been soaking up her essence this whole time, and now the pent-up lust was spilling over.

One-minute sex just wasn’t cutting it anymore—not for this kind of hunger.

Even instant curry takes three minutes to heat up; what the hell was he supposed to do with one?

No matter how good cumming felt, but sex was supposed to be about movement, about the grind and rhythm.

Deneb seemed fine with it—probably because she always hit her climax from the mana surge alone, but Siwoo could feel himself losing it a little more every night.

“...Please let us kill that thing today.”

All he could do was clasp his hands and pray that tonight, they’d finally pull it off.

2.

Meanwhile, in the room next door, Deneb was also sighing as she comforted herself.

-Squelch, squelch, squelch

“Haaah....”

The desert fox from The Little Prince once said:

‘If you come at four in the afternoon, I’ll begin to be happy from three.’

Ever since they’d silently agreed to only have sex for mana charging during the day, about an hour after sunrise, Deneb’s body would start heating up the moment the sun came up.

She’d get so wet she could be fucked right away, even without touching herself.

So the reason she was playing with herself to the point it sounded this wet... was just to ease that dull, gnawing ache inside.

The first time they had sex hurt the most.

It was her first time, and Siwoo’s cock was ridiculously big so much so that even after it was over, her hips stayed sore and her pussy kept throbbing.

The second time was a little better.

She was still adjusting to this kind of sex, though, so after Siwoo climbed on top and thrust just a few times, he came inside her.

By the third and fourth round of trial and error, they’d hit a rhythm.

Now, they were at the point where the moment their bodies locked together, he could cum.

But somewhere along the way, Deneb started to feel like something was missing.

Charging her mana still felt amazing.

It was the kind of pleasure that made her whole body twitch as she came.

Up until the fourth time, that was enough for her.

She panted in pure pleasure for so long, she couldn’t even get up for a while.

“Uuh...”

However, Deneb found an ominous sign during the fifth recharge.

A weird craving started to crawl up inside her.

Even after being filled and hitting her climax, she felt this nagging hollowness inside, like something still hadn’t been satisfied.

When his cock slipped out of her twitching belly and she forced a few words of small talk before awkwardly turning away—this unfamiliar feeling hit her like a cold splash.

Like she’d been abandoned or something...

Of course, it wasn’t as if they were in a relationship where she could abandon him or be abandoned, and she knew that Siwoo was being considerate of Deneb’s position.

Therefore, Deneb rationalized herself.

This was a crisis, and no one knew what could happen next.

Witch or not, she was still human at her core.

A stressed body responded with a heightened sex drive, a survival instinct to reproduce.

She wasn’t just pulling excuses out of thin air.

Even if she acted chill so she wouldn’t make Siwoo anxious, Deneb was definitely feeling uneasy.

What if they really were stuck here forever?

What if the Witch of the Deep Sea showed up and shit hit the fan in a way they couldn’t handle?

The truth was, all that anxiety seemed to quiet down for a bit the moment their bare skin touched.

Physical contact and orgasms trigger the release of oxytocin in the hypothalamus, which calms your nerves—so being physical with him like that was basically her emotional sedative.

Furthermore, given that this oxytocin is categorized as the “love hormone” that induces attraction to the opposite sex and is formally known as the “uterine contraction hormone,” it wasn’t strange that her feelings toward Siwoo were taking a weird turn.

She had almost hugged his neck and kissed him right after he’d cum the day before, after all.

And so, from the sixth time onward, Deneb found herself unconsciously anticipating the moment Siwoo would open the door and come in—right after he’d edged himself to the brink of climax through masturbation.

It was such a faint little voice inside her that she might’ve missed it if she hadn’t paid attention.

But it was there, whispering nasty things like,

‘Maybe today he won’t hold back and he’ll fuck me harder...’ or ‘What if he can’t resist and just pins me down like he did when he suddenly grabbed my tits?’

“I’m coming in.”

The moment she heard Siwoo’s voice, Deneb immediately stopped touching herself.

He barged in without knocking and dove straight between her spread legs on the bed.

This was the moment Deneb most looked forward to, her heart pounding with anticipation.

Without saying a word, Siwoo grabbed his cock and lightly dragged it across her slick, eager pussy lips.

He’d timed it so precisely, arriving right before climax, that his movements were instinctively quick and efficient.

If the timing was off, he might’ve ended up needing to cum twice.

Just then, a thought flickered in Deneb’s mind.

The longest they’d ever gone at it was that very first night.

Back then, Deneb had kept him waiting outside for a long while, saying she needed time to get ready.

In that time, he’d ‘cooled down,’ and since she needed to adjust to him, they moved slowly inside for a while.

So then....

If she could delay his penetration now, wouldn’t that naturally lead to a little more motion inside?

Just as the head started to slip in, Deneb’s cold feet, still lifted in the air, gently pushed against his chest.

“Mr. Siwoo...! W-wait a second...!”

“Ah...!”

Caught off guard, Siwoo’s body leaned back from the push, and with only the tip inside, his cock slipped out.

In the process, his dick, stimulated by Deneb’s tight pussy entrance, began to ejaculate.

-Spurt! Spurt! Spurt!

“Eek...!”

The amount he shot was insane.

The sputtering anti-aircraft gun’s first target was Deneb’s noble face.

Deneb, who was unexpectedly drenched in cum, frowned, and thanks to his belated efforts to clean it up, he managed to cum on her lower abdomen.

An accidental pull-out and an unintentional external creampie.

Thick cum pooled like a spring in her deep-set navel on that smooth, toned stomach of hers.

“Ugh....”

“I-I’m so sorry!”

“...It’s fine.”

With hot cum splattered across her face, Deneb trembled slightly, then used magic to clean herself up.

Thankfully, she didn’t lash out.

“I’ll head to the next room and take care of it again.”

But after what just happened, a reset was unavoidable.

Just as he started to rise from the bed....

“.......”

Deneb’s hand suddenly reached down and wrapped around his cock.

Then, without saying a word, she carefully guided his still-rock-hard dick back into her.

Her hot, slick pussy flesh swallowed his overstimulated shaft with a sticky, needy squeeze.

“Ms. Deneb, what are you...?”

Siwoo blinked, clueless, unable to read what she was thinking.

Avoiding his eyes, her cheeks flushed a deep crimson, she murmured so softly it was barely a whisper.

“Do it... masturbate....”

“To masturbate... I’d need to pull out first...”

But instead of answering, her long legs slowly wrapped around his waist.

Her leg, wrapped around him as if to prevent Siwoo from escaping, was subtly pulled forward, as if to aid insertion.

Seeing that, even clueless Siwoo finally got the message.

His little mother-in-law was telling him—

To use her body... to finish jerking off.