The Extra's Advent: My Villainess Fiancée is a Yandere

Chapter 165: Supreme Sovereign of Pure Sea

Primordial Era

In the vast nine seas, a group of mermaids was scolding a little mermaid who was oddly black, unlike other mermaids.

Among mermaids, black fins were considered an ill omen.

While others possessed tails that shimmered like pearls, coral, or gemstones beneath the sunlight, hers were dark as the deepest trenches of the ocean, where no light had ever reached.

Wherever she swam, whispers followed. Wherever she went, eyes turned away.

She became an outcast before she even understood what being an outcast meant.

The little mermaid spent most of her days alone. The ocean was vast, yet loneliness made it feel small.

To escape the gazes of her own kind, she often wandered toward the edges of the sea, entering rivers and lakes connected to the human world.

There, she discovered something strange.

Humans planted seeds. At first, she did not understand why.

The seeds looked insignificant, tiny, and lifeless, hardly worthy of attention.

Yet humans carefully buried them beneath the soil and returned day after day to tend them.

The little mermaid watched.

Days passed, and the seed sprouted. Weeks passed, and the sprout became a plant.

Months passed, and leaves grew. Seasons changed, and flowers bloomed.

The flowers withered, and fruits appeared. The fruits ripened, and inside them were countless seeds.

Then the cycle began once more.

The little mermaid did not know why, but she found herself captivated.

She returned every day to watch. The growth was slow, so slow that humans barely seemed to notice it.

Yet when she compared a plant to how it had looked days before, she could see the difference clearly.

Something was happening. Something beautiful. Something mysterious.

For the first time in her life, she wanted something. She wanted to grow a plant herself.

Unfortunately, she was a mermaid. Land was not her home. Remaining outside the water for too long exhausted her.

She attempted to grow plants underwater. She gathered seeds and buried them in ocean soil.

She waited. Some grew, but most did not. Yet even when they succeeded, it felt different.

The underwater plants lacked the feeling she experienced while watching the human farmers.

The little mermaid could not understand why.

One day, while watching flowers sway beneath the sunlight, she realized a painful truth. She could never do it.

She could never cultivate a garden as the humans did.

The realization left her strangely saddened.

Years passed.

She continued visiting the lakes. The farmers changed. Children became adults. Adults became elders. Elders disappeared.

Yet the fields remained.

Seeds became plants. Plants became flowers. Flowers became fruits. Fruits became seeds.

Again. And again. And again.

The little mermaid never stopped watching. Though she did not realize it, something was slowly taking root within her.

A comprehension.

A truth hidden beneath countless cycles.

Something that could not be learned through books or inherited through blood.

The answer was simply life itself.

Life was growth. Life was change. Life was a continuation. Life was not permanence.

The flower bloomed because it would eventually wither. The fruit ripened because it would eventually fall. The seed carried the future because the present would someday end.

The little mermaid understood this only after many years.

By then, she was no longer little.

Time passed. Then more time passed. Kingdoms rose. Kingdoms fell. Empires vanished beneath history. The sea remained. And so did she.

The outcast mermaid gradually became something far greater than anyone could have imagined.

Not through ambition. Not through conquest. Not through desire. Simply through time.

Ten thousand years passed. Then fifty thousand. Then one hundred thousand.

...

Medieval Era

The little mermaid with black fins, the disgrace of mermaids vanished from memory of others.

In her place stood the Supreme Sovereign of Pure Sea. The ruler of the nine seas. The overseer of countless races.

Mermaid clans. Water dragon clans. Sea horse tribes. Ocean spirits. Ancient leviathans. All existed beneath her authority.

Many questioned how such a thing had happened. The answer was surprisingly simple.

She outlived everyone.

The mermaids who mocked her were gone. The elders who condemned her were gone. The kings who ignored her were gone.

The heroes who challenged her were gone. Even entire civilizations had become dust.

She had killed none of them. She merely remained while time carried everything else away.

Eventually, the mermaid clan began referring to her as their ancestor. Then their progenitor. Then their origin.

Not because she truly was, but because nobody alive remembered a time before her existence.

She became a primordial being. A living piece of history. A witness to ages.

Yet despite possessing authority over endless oceans, a small corner of her heart remained unchanged. The little mermaid still remembered the plants.

One day, during a rare stroll through a forgotten region of the sea, something unusual caught her attention.

A faint light, flickering from a crack hidden within an ancient rock formation.

Curious, she followed it.

Inside the opening was a pocket of trapped air. Such a thing was insignificant to most. To her, it was intriguing. Using her authority, she widened the passage.

The cavern beyond revealed itself.

For the first time in many thousands of years, genuine surprise appeared on her face. Beyond the opening lay an enormous expanse of barren land. Dry. Empty. Silent.

Untouched by civilization. Untouched by life. A forgotten world hidden beneath the sea.

For a long moment, the Supreme Sovereign simply stood there.

Then she smiled. It was a small smile, soft and gentle, the same smile that once belonged to a lonely little mermaid watching flowers bloom beside a human lake.

Without hesitation, she began her work.

She raised an artificial sun into the sky using her authority. Its light illuminated the empty land. She redirected streams of water. She enriched the soil. She removed poison and decay.

Mountains shifted. Rivers formed. Valleys emerged.

What would have taken nature millions of years was accomplished in mere decades beneath the hands of a Supreme Sovereign.

Yet she remained patient. For this was not a task to be rushed. This was gardening.

The first seed she planted with her own hands was ordinary. There was nothing special about it. No divine seed. No heavenly power.

Just a normal, ordinary seed.

She buried it gently and waited.

Days passed. The seed sprouted.

For the first time in over one hundred thousand years, the ancient sovereign felt a joy unlike any she had experienced while ruling the oceans.

The sprout became a plant. The plant became a flower. The flower became a fruit. The fruit produced seeds. The cycle continued.

Just as she had witnessed long ago beside the human lake.

Years became centuries. Centuries became millennia.

The barren world transformed. Forests spread across the horizon. Flowers painted entire valleys. Rivers sparkled beneath artificial sunlight. Countless forms of life emerged.

The hidden realm became a paradise. A garden unlike any other.

Satisfied, the Supreme Sovereign retired from her duties. The younger generations inherited responsibility for the oceans.

The ancient ruler devoted herself entirely to her garden.

At last, her life became peaceful. No wars. No politics. No burdens. Only soil, sunlight, flowers, and time.

The ancient sovereign believed this tranquility would continue forever.

She was wrong.

One day, while tending a newly blossomed tree, she felt an unfamiliar disturbance. Something had entered the garden.

A trespasser. A fool.

Someone who had somehow found a path into the hidden paradise.

The Supreme Sovereign slowly raised her head. After countless ages of peace, fate had finally delivered a visitor to her garden.

And with that single step, the peaceful story of a gardener was destined to become something far more complicated.

...

Current Era

Inside the realm, in the core domain.

A man was nailed to a stone slab. His hands and legs were pinned. His chest was pierced. His heart and throat were also nailed.

His hair was a mess, tangled and matted. His clothes were torn and soaked with blood.

-Drip.

-Drip.

His blood poured from his wounds, falling from the nails to the ground below, where a large pool of blood had formed.

The blood pool had grown over the years, spreading across the stone floor like a dark stain that refused to dry.

Sometimes, when the silence grew too heavy, he would stare into it and watch the ripples.

Each drop that fell created a new wave, spreading outward like the consequences of his actions.

He had lost count of how many drops had fallen. Thousands. Millions. Each one a reminder of the moment he had chosen this fate.

He did not remember what it felt like to move freely, to breathe without pain, to close his eyes without seeing the faces of those he had failed.

He had been here for so long that time had lost its meaning. He had tried to count the days once. He had given up after the first century.

His eyes turned heavy as he looked at the blood pool beneath him. The pool reflected his face. A shadow of the man he had once been.

"If only... I never did that foolish thing."