Writing Love Letters in the Enemy’s Toilet - A Vow of Eternal Love, Even After Rebirth (Transmigration) - Chapter 28 – To the Future

Time passed—

Before the Keimei Society could act, under the guidance of Mitsutomo, humanity discovered the ancient spaceship. With the Yatagarasu and the Freemasons devoting all their resources to its development, their efforts finally bore fruit—mankind migrated to Mars.

There, humanity built colonies and began cultivating the red soil. Inside the colonies, they even created facilities to recreate nature—gardens filled with flowers and green trees.

As generations passed, and those who had first led the Mars migration passed away, the human population gradually increased. To secure more living space, they expanded the boundaries of their settlements.

One day, in a newly constructed flower field inside one of the colonies, a young girl wandered in. It seemed to be her first time seeing flowers.

“What are these? They’re so pretty…” she whispered in awe, her eyes shining as she gazed at them.

Then, a white butterfly fluttered past. Seeing it, the girl chased after it with delighted laughter.

A man overseeing the garden noticed her. “Hey there, little one! How did you get in here?” he called out.

The girl turned, met his eyes—then gasped, “Ah!” and bolted.

The man ran after her and caught her by the arm. “Why are you running? Who did you come here with?” he asked.

The girl didn’t answer.

He tried again. “Where do you live? Who’s your father? Your mother?”

Still, she said nothing.

At a loss, the man decided to call the police for help.

When the officers arrived and tried to escort the girl into their patrol car, she seized a brief moment of distraction—and ran.

“Hey! Stop!”

The police chased her, but the girl slipped through a narrow crevice between great red rocks. The officers followed—and discovered a tunnel leading downward.

Flashlights in hand, they went deeper, searching for her. Soon, a faint light appeared ahead.

They approached it—

—and suddenly, their view opened wide.

Before their eyes stretched a hidden city—streets lined with houses and tall buildings, softly illuminated in the cavern’s glow.

“What in the world…? A city? Down here?”

The officer stood frozen for a moment, stunned. Then reality struck. “This… this is a huge discovery!”

He turned on his heels and sprinted back the way he came.

Meanwhile, the girl returned to the underground city and entered a large mansion.

At the entrance stood a young woman, arms crossed, a stern expression on her face.

“Ann! Where have you been? I was worried sick!” she scolded.

The girl burst into tears and ran to her, crying, “Luna, big sister!”

“What’s wrong?” Luna asked, kneeling beside her.

Ann sobbed harder.

“You have to tell me, I can’t understand if you just cry!” Luna said gently.

Ann hiccuped and said, “A white fluttery thing flew by, so I chased it… then an old man found me and tried to take me away!”

Luna’s eyes widened. “A white fluttery thing? Ann… don’t tell me—you went up there?”

Ann nodded. “Uh-huh! There were so many colors—it was beautiful!”

“I told you never to go up there!” Luna’s voice rose sharply.

Startled, Ann began crying again.

“Did anyone follow you back?” Luna asked quickly.

“I don’t know!” Ann shook her head, tears streaming down.

Luna frowned. “If someone saw her… they might have found us! I have to warn everyone!”

She took Ann by the hand. “Stop crying, come inside,” she said, leading her in. Then Luna dashed up the stairs.

“Selene! Big trouble!” she shouted, bursting into a room.

“Luna! What is it? And at least knock first!” Selene scolded.

Luna caught her breath. “Ann’s been spotted!”

Selene blinked. “Well, thank goodness she’s safe then.”

“That’s not it!” Luna said urgently. “She was seen by people from the surface! They might know where we are now!”

Selene’s face turned pale. “What? That’s… bad. Very bad…”

“Call the elder, now!” she ordered.

“Understood!” Luna ran from the room.

Moments later, a knock came at the door—but before Selene could answer, it swung open.

“Princess, I’ve heard from Lady Luna. This is serious indeed,” the elder said gravely.

Selene sighed. “We’ve always followed the ancient law—to never deal with outsiders. What should we do now?”

“For now, we must evacuate the people,” the elder replied. “If the outsiders invade, then…”

“Then…?” Selene pressed.

“…We’ll have no choice but to face them with the Black Dragons,” he finished.

Selene shook her head. “But our ancestors forbade us from using the dragons for war!”

“Our duty is to protect our people!” the elder said firmly. “This isn’t the time for hesitation!”

“Luna! Evacuate everyone,” Selene commanded. “We’ll wait and see what they intend.”

“I can’t do it alone!” Luna said.

“I’ll send the knights to help,” the elder assured her.

As they turned to leave, Selene called out, “Elder! Arrange for the Black Dragons—just in case.”

Then, to Luna: “Be careful!”

“I will! Sister, you should evacuate too!”

“No. I must stay. If they come to talk, someone must meet them. It’s my duty as princess,” Selene said quietly.

“Will you be all right?”

“If something happens… you’ll take my place.”

“Please… be safe,” Luna whispered, and hurried away with the elder.

Soon, the city’s people had been led to underground shelters. At the entrance stood two colossal Black Dragons—ancient weapons that once scorched Mars in ages past.

Moments later, a small squad of armed soldiers approached the gate. They froze, staring up in awe.

“What… are those things…?”

“Are they weapons?” one whispered.

At once, the soldiers tensed, readying their guns. The dragons stirred in response, their eyes glowing faintly.

Then—

“Stand down!” a commanding voice called from behind.

“But, sir—”

“We didn’t come to fight! We came to talk!”

A man stepped forward, passing his troops. Approaching the dragons, he called out clearly:

“My name is Langston of Animus! I wish to speak with your leader!”

A knight emerged from behind the dragons.

“We mean no harm,” Langston continued. “We only ask for a chance to talk.”

“Talk…?” the knight murmured, wary. Then he nodded. “Wait here. I’ll confirm.”

He whispered to another knight, who quickly ran into the city.

After some time, the messenger returned.

“The princess will see you,” the knight announced. “But you must come alone.”

Langston’s soldiers protested, but he raised a hand.
“I’ll go alone.”

“Sir, but—”

“Don’t worry.”

“Follow me,” the knight said, leading him inside.

Langston entered the mansion and was shown to a room at the top of the stairs.

Inside sat a young woman and an elder standing at her side.

“Pleased to meet you,” Langston said with a polite bow.

The elder stepped forward. “I am Elder Morgan. This is Princess Selene of Niflheim.”

Selene rose and bowed slightly. “I am Selene.”

“My apologies for the precautions,” Morgan said.

“I understand,” Langston replied.

“Please, sit,” Morgan said, gesturing. They all took their seats.

“So, about this… discussion,” Morgan prompted.

Langston began, “To be direct—we hope for peaceful coexistence on this planet.”

Selene tilted her head. “Then… you do not wish for conflict?”

“No. Our ancestors lost their homeworld, and fled here. We know the pain of being driven away—we would never do the same to others.”

“Then leave this world,” Morgan said sternly.

Langston sighed. “If we had known you lived here, we would have chosen elsewhere. But now… our colonies are built. There’s nowhere else to go.”

Selene said softly, “Our ancestors were destroyed by outsiders, and so we vowed never to interfere with those from above.”

Langston nodded. “We will not interfere. We only ask permission to live in our colonies.”

“If you will not meddle in our affairs…” Selene hesitated.

“Of course, there may still be issues in the future,” Langston added. “We can work through them, together.”

Morgan folded his arms. “Then we must also hold our own discussions.”

“Of course. This is merely a greeting. When preparations are ready, we’ll meet again,” Langston said, rising.

“My men are waiting. I’ll return another day. Perhaps, in time, we can help each other.”

“Understood. I’ll have our knights escort you,” Morgan said.

After Langston left, Morgan sighed in relief. “That went better than expected. He seemed friendly enough.”

Selene nodded. “A gentleman. I must let everyone know.”

“Oh! The evacuees!” Morgan exclaimed, summoning the knights. “Inform the people—they can return!”

From that day forward, Niflheim and Animus began regular talks, and soon, a peace treaty was signed.

As the two societies grew closer, they studied ancient records—and learned that the weapons known as the Black Dragons were brought to Mars long ago by a man called Housensai, who was also the ancestor of those who had seized Earth and exiled humanity.

Realizing their shared history, cooperation deepened.

Animus built playgrounds for Niflheim’s children, while Niflheim aided the surface’s terraforming.

When Niflheim began deploying Black Dragons to assist with surface work, Animus scientists studied them and discovered they were based on Trinity technology. Research began in earnest.

But soon, a rift formed within Animus.

“With the Black Dragons, couldn’t we take back Earth?” some argued.

Others opposed: “And what would that achieve? We can’t even control them!”

“Then let’s ask Niflheim to help!” someone suggested.

Animus approached Niflheim—but Selene refused. “We will not endanger our people for vengeance!”

“They stole your world too!” Animus insisted. “If we reclaim Earth, we can return it to you!”

Selene shook her head. “Let’s stop clinging to the past. We can live together here.”

Yet even among her people, whispers began—those longing for the surface, tempted by revenge.

Despite Selene’s pleas, resentment grew. Both Animus and Niflheim fanned the flames of vengeance—until the fire of war was reignited.

Meanwhile, on Earth, those who once swore revenge on humanity—Nagata, Keifuku, and others—had long passed away. The survivors lived in peace.

Until one day—

A shadow appeared above Shibuya.

“What’s that?”

A high school girl on the train pointed to the sky. Her friend followed her gaze—just in time to see the black shape swell larger, then descend—

Crashing into the city.

The black monster unleashed fire, burning Shibuya to ash. Thousands perished.

From Mars, under the guidance of Dr. Lucifel of Niflheim, the Black Dragon had been sent to Earth—its flames heralding war.

The Animus Federation was declared. Soon after, Earth received a message—
A declaration of war.

Earth responded swiftly. The Providence Defense Force was formed, led by Byakko and Genbu, the twin guardians.

Thus began the great war for Earth’s fate—
Ragnarok.

Many times, the Black Dragons attacked, but Byakko and Genbu, with their superior performance, fought them off and defended Earth.

Even so, the toll was heavy. Many children were orphaned and taken into shelters.

To them, the mighty Byakko and Genbu were more than machines—
They were heroes.

“Someday, I’ll pilot Byakko or Genbu myself… and defeat the ones who took my parents away.”

In their hearts, the dream of justice burned bright.