The night was like a huge black curtain, pressing heavily on the sea.

The fighting these past few days has been brutal.

From exploring the misty ruins and labyrinths to luring and killing the demon whale and modifying the warship, every step was pushing everyone's nerves to the limit.

At this moment, the sea was deathly silent.

Only the deep idling sound of the "Presidential" engine occasionally broke the silence.

On the distant horizon.

The terrifying "Black Tide" also stopped.

That was no ordinary night.

It was a death curtain composed of billions of tiny, bone-eating worms, invisible to the naked eye.

During the day, they devour everything in their path like mad dogs.

At night, as the temperature drops, these animals enter a hibernation state, hovering in mid-air like a wall separating life and death.

No one dared to approach that wall at that moment.

Qin Yu stood in front of the huge floor-to-ceiling window in the captain's cabin, a cigarette dangling from his fingers.

The view outside the window was dark, but he was engrossed in watching it.

Inside, the air was filled with a pleasant and warm atmosphere.

That's the smell of hormones unique to those who have just finished strenuous exercise.

"Draw the curtains."

A lazy, slightly hoarse voice came from behind.

Qin Yu turned around.

On the large, custom-made bed, the blankets were piled haphazardly in one corner.

Yao Xue was lying on her side at the head of the bed.

Her usually meticulously styled hair was now loosely draped over her shoulders, with a few strands sticking to her fair neck with sweat.

Her face, which was originally as cold and aloof as an iceberg, was now flushed with a breathtaking blush.

Those phoenix eyes, which always held a scrutinizing look, were now half-closed, filled with lingering moisture.

She reached out and pulled the blanket over her chest, covering a large expanse of her white skin, leaving only her long legs, clad in black stockings, casually draped over the edge of the bed.

The black stockings already had several holes in them.

That was the result of Qin Yu's excessive roughness just now.

"What's there to be afraid of?"

Qin Yu exhaled a smoke ring, a wicked smile playing on his lips.

"On this vast ocean, besides seabirds, who else can see us?"

"We'll see."

Qin Yu walked back to the bedside and reached out to pinch Yao Xue's smooth thigh.

"When you were yelling so loudly just now, why didn't you think to close the curtains?"

"You still dare to talk back!"

Yao Xue glared at him, embarrassed and annoyed, and raised her foot to kick him.

But Qin Yu grabbed the ankle of that limp foot.

Pull it along with the momentum.

Yao Xue gasped and slid back into Qin Yu's arms.

"No...don't come anymore..."

Yao Xue was truly terrified.

She was a surgeon, so she was physically strong to begin with.

After that hour of ordeal, she felt like her bones were about to fall apart.

"I really have no strength left..."

Yao Xue buried her head in Qin Yu's chest, her fingers unconsciously tracing circles on his firm abdominal muscles.

"Xiaoqian is a very energetic girl, go find her..."

"Just kidding."

Qin Yu kissed her smooth forehead and hugged her tighter.

"Take a break if you're tired."

The two hugged quietly for a while.

Enjoying the rare warmth in this apocalyptic world.

Qin Yu ran his fingers through Yao Xue's long hair, gently combing it.

In this world where you could die at any moment.

Only the warmth of the woman in his arms could make him feel that he was still alive, still alive like a human being.

"Qin Yu".

Yao Xue suddenly spoke, her voice regaining some of its usual calmness.

"Um?"

"That 'Deep Blue Shadow' system you just installed..."

Yao Xue raised her head, her eyes flashing with a thoughtful light.

"I just looked at the instruction manual on the control panel."

"The technology behind this thing is probably more advanced than any of the gadgets we've ever seen before."

Qin Yu smiled.

"That's natural."

"If an SS-level item doesn't have some cutting-edge technology, wouldn't that be a disgrace?"

"It's not just about high technological content."

Yao Xue sat up straight, letting the blanket slide down to her waist.

She reached for the glass of water on the bedside table and took a sip.

"The most crucial aspect is its airtightness."

Did you notice?

"The instruction manual states that once the submersible mode is activated, the entire ship will enter an 'absolutely airtight' state."

"To withstand the terrifying water pressure at a depth of 3000 meters."

"Every gap in the hull, every vent, and even the sewage outlet will be sealed off by special liquid metal and force field shields."

"This level of sealing..."

Yao Xue paused, her eyes sharpening.

"Let alone water."

"Even viruses, or even nanoscale dust particles, can't get in."

As Qin Yu listened, he stopped what he was doing.

He looked at Yao Xue's serious face.

It felt like a bolt of lightning had struck my mind.

"Absolutely airtight..."

Qin Yu muttered to himself.

"Even nano-sized dust particles can't get in..."

He turned his head sharply and looked out the window at the pitch-black distance.

There.

The Kuroshio Current remained suspended silently.

"etc."

Qin Yu's voice suddenly rose a few decibels.

He grabbed Yao Xue's shoulder with such force that Yao Xue frowned.

"Xiaoxue, what did you just say?"

Say it again!

Yao Xue was startled by his sudden reaction.

"I mean... with this level of sealing, not even a speck of dust can get in."

"What's wrong? You're hurting me."

Qin Yu let go and jumped off the bed.

They didn't even bother to put on clothes.

He walked back and forth barefoot on the carpet.

His eyes grew brighter and brighter.

It looked like two will-o'-the-wisps burning.

"Dust...insects...black tide..."

Qin Yu slapped his thigh suddenly.

"Hold!"

"Why didn't I think of that sooner!"

"What didn't you expect?"

Yao Xue looked at Qin Yu, who seemed to be on steroids, with a blank expression.

"This submarine mode isn't just for evading enemies on the sea."

"It's not just about going to Haidilao to retrieve treasures."

Qin Yu rushed back to the bedside, placed his hands on either side of Yao Xue, and stared intently into her eyes.

"Xiaoxue, you're a doctor."

"You know this thing's construction best."

"Think about it, what exactly is this so-called 'Kuroshio'?"

Yao Xue paused for a moment, then replied:

"Based on previous observations and system prompts."

"The Kuroshio Current is essentially a mutated bone-eating worm that migrates in clusters."

"The individual particles are extremely small, like dust particles."

"It lives by consuming organic matter and energy."

"They are afraid of the cold and fire, but their numbers are endless."

"Where it passes, not a blade of grass grows."

Qin Yu snapped his fingers.

"right!"

"It's just a bug!"

"They are living things! They are living beings!"

"Since they're insects, even if they mutate, shouldn't they still follow the basic laws of biology?"

Qin Yu pointed to the sea outside the window.

"They are terrestrial or aerobatic variants."

"We were on the sea, and they could fly over and seep into the gaps in the raft like mist, gnawing people down to their bones."

"but!"

"What if we were underwater?"

This question.

This question stumped Yao Xue.

She opened her mouth, and her pupils dilated instantly.

"Underwater..."

"You mean...?"

"This kind of insect can't dive?"

"It's not just that I can't dive."

Qin Yu sneered, his eyes burning with even more fervor.

"Think about it."

"If we could swim in the Kuroshio Current, would the fish in this ocean still be able to survive?"

"Those sea monsters have long been devoured!"

"But in fact, the marine ecosystem, though mutated, is still thriving."

This illustrates a point.

"These beasts can't go into the water!"

Qin Yu spoke more and more fluently, his thoughts had never been so clear.

"Or perhaps they are too light to break the surface tension of water."

"Either the high salinity or pressure of seawater can kill them."

In short

"That layer of sea is the boundary they can't cross!"

Yao Xue understood completely.

Her professional competence as a doctor allowed her to quickly construct a model in her mind.

"If your guess is correct..."

Yao Xue's voice trembled slightly.

"Then all we need to do is activate 'submersible mode'."

"Hide underwater."

Even if it's only ten meters deep.

"That overwhelming black tide, it's as if it doesn't exist for us?"

"Bingo!"

Qin Yu snapped his fingers excitedly.

He gave Yao Xue a big kiss on the cheek.

"Wife, you're truly my lucky star!"

"If you hadn't mentioned the airtightness, I really wouldn't have thought of that."

Qin Yu straightened up and strode to the control panel.

The fear from before.

Previous concerns.

It all vanished in an instant.

What is the Kuroshio Current?

That was the nightmare of all survivors.

It is the sword of Damocles hanging over everyone's head.

Once the Black Tide arrives, everyone can only desperately upgrade their rafts, reinforce their defenses, use fire, use poison spray, or even just pray for good luck to survive.

In the face of the Kuroshio Current.

The survivors are lambs to the slaughter.

But now.

Qin Yu found a bug.

A bug that allows him to roam freely in this world-ending catastrophe!

Qin Yu laughed wildly as he put on his pants.

"I'm going to dive right now!"

"I'm eating hot pot and singing songs underwater."

"Just staring blankly at those idiot bugs on the water's surface."

"This scene..."

"Tsk tsk tsk."

Qin Yu put on a black tactical vest, covering his well-built muscles.

"no."

"Thinking about it won't help."

"It must be tried."

Yao Xue shook her head helplessly at his impatient look.

"It's nighttime now, the Kuroshio Current is dormant, how can you try?"

"And weren't you exhausted just now?"

"That was just now."

Qin Yu turned around, his eyes gleaming.

"Men never get tired when faced with new toys."

"The Kuroshio Current has gone dormant."

"But the wall is still there."

"Aren't they perfect targets, standing there motionless?"

Qin Yu walked to the bedside, picked up Yao Xue's torn white coat, and threw it aside.

Then he took a brand new combat uniform out of the closet and handed it to her.

"Put them on."

"Come with me to the driver's seat."

"I want to personally verify whether this 'Deep Blue Shadow' can withstand those swarms of insects."

Yao Xue took the clothes.

Looking at Qin Yu's tall and straight back.

A strange sense of security welled up inside me.

This is the man she has her eye on.

Sometimes he acts like a rogue.

Sometimes she can be as ruthless as a devil.

But at this crucial moment.

His mind works faster than anyone else's.

He's bolder than anyone else.

"They're here."

Yao Xue quickly got dressed and casually tied her long hair into a ponytail.

That aloof and beautiful head of surgery is back.

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