Reborn as an Yandere : Yandere X Yandere
Cogito Ergo Sum!

In the head office of Imagica Books, the hallway was calm and quiet—until the sound of footsteps echoed through it.

Two people dressed in full police uniforms walked confidently toward the main entrance. Their presence caught the attention of many staff members passing by.

One of them had green and yellow hair, a bit messy but giving off a strong and wild charm. His face looked rough, but there was something trustworthy about it.

The other was neat and serious-looking, with sharp eyes and well-combed blond hair. His expression was calm and professional, almost like he didn’t want to be there—but was doing his job anyway.

They weren’t real police officers. They were detectives, working secretly for the well-known newspaper Anastasia Times. Their job today? To find out more about the mysterious author behind the popular book “The Future I Saw.”

To make their investigation easier, they had decided to dress like police officers—hoping it would scare the workers a little and get them quick answers.

As they reached the front desk, a young woman looked up from her seat. She was probably in her twenties, with reddish-brown hair and a sharp “V” shaped face. Just by her appearance, you could tell she was the type who loved to talk and gossip.

But when she noticed the fake officers standing in front of her, she tensed up slightly. Her hands froze on her desk for a second before she forced a smile and spoke politely.

“H-How may I help you, sir?”

The green-and-yellow-haired man stepped forward confidently.

“I’m Auren. Investigation officer,” he said, showing a very official-looking document—completely fake, of course. “I need to speak with your publishing director or manager. It’s about something important.”

He pointed at the blond man behind him. “And this is Emilyn White, my assistant.”

“Assistant?” Emilyn muttered under his breath, his lips twitching in annoyance. But he didn’t say anything. He just gave a stiff nod, playing along.

“Please wait here for a moment. I’ll go check,” the receptionist said quickly, already standing up.

She walked away briskly, her heels clicking against the floor.

A minute and a half later, she returned with a slightly nervous look.

“You can go to the second floor. Room number four.”

Auren nodded and walked off with Emilyn behind him, heading up the stairs.

The building was quiet, and the wooden steps creaked just a little as they moved up. Reaching the second floor, they found the door marked Room 4 and gently pushed it open.

Inside sat an older man with a thick white mustache and only a ring of hair left around his bald head. His belly was round, and he wore a brown sweater with a coffee stain on the sleeve. He looked kind but tired—someone who had worked in publishing for a long time.

“Welcome, officers,” he said as he stood up with effort. “I’m Morel Hall. Just call me Mr. Hall. What can I help you with today?”

He smiled politely, not suspecting a thing.

Both Auren and Emilyn stepped into the office and didn’t even bother to sit down. They went straight to the point.

“We’re investigating the book The Future I Saw,” Auren said firmly. “Do you know anything about the author? Is it a man or a woman? And why is your company holding the rights to the book instead of the author? Tell us everything—how the author contacted you and how the publishing agreement was made.”

He fired off all the questions quickly, hoping to catch Mr. Hall off guard—maybe get him to panic and spill something he shouldn’t.

Auren actually had even more questions prepared in his mind. If Mr. Hall handled these without getting nervous, he would push harder.

But Mr. Hall’s expression suddenly changed. His smile vanished, and his eyes turned sharp.

Then, in a calm but firm voice, he asked one simple question:

“Do you have a warrant?”

Auren and Emilyn froze.

That one sentence hit them like a hammer. They weren’t real officers. Of course, they didn’t have a warrant.

Seeing their stunned faces, Mr. Hall gave a faint smile and leaned back in his chair.

“I see. So you don’t. Then I’m sorry, I can’t answer anything about this matter. Please leave. I have other work to do.”

He turned away and started looking through some papers, completely ignoring them.

Auren and Emilyn looked at each other in silence. There was nothing more they could do. Without saying anything else, they quietly left the room and walked down the stairs to the ground floor.

As they walked, Emilyn sighed and gave a dry laugh.

“I was always the one supporting the idea of teaching people about their rights and the constitution. The more they know, the better… right?” he smiled bitterly. “Well, I guess it backfired on us this time.”

He turned his head toward Auren. “He definitely knows something. What now?”

Auren’s expression was sharp. His green eyes gleamed with determination.

“Now?” he said in a low voice. “Now how about we do something unprofessional?, Let’s kidnap that bastard.”

----------

It was already night in Esdeath’s room.

Empty potion bottles were scattered all over the floor. The table had a few empty dishes too. The room looked like a small storm had passed through it.

Esdeath was sitting on a chair, arms crossed, eyes thoughtful.

Selene was lying on the bed, rubbing her belly with a tired look.

“I can’t drink anymore…” Selene murmured in a weak voice. Her stomach was full from drinking too many mana-increasing potions.

For the last few days, both of them had been doing the same thing—drink potions to increase mana, go out and kill monsters to gain experience, and then use magic and Essence Stones until their energy ran out.

It was working… somewhat.

But the third part—completely exhausting themselves—wasn’t going as planned.

“I’m already as strong as a Rank B… maybe even stronger than the average Rank B,” Esdeath thought, staring at the ceiling. “What I really need now is to fight someone at my level. Or someone stronger.”

The first person who came to her mind was Lortell.

There could be no better opponent than an S-Rank Awakened. Training with her would be the fastest way to get stronger.

But then Esdeath let out a tired sigh.

“She would never agree to anything that could hurt me… And even if she did, how am I supposed to explain this crazy growth in power?”

In just two to three months after awakening, Esdeath had already grown more than most B-Grade ESR talents ever did in years.

Normally, people like her weren’t even expected to reach Rank B unless they had a second awakening.

Yet here she was—already beyond that point.

If she continued at this pace, she might even break the legendary record of Lortell Mariette herself, who had become S-Rank in the beginning of her third year at the academy.

"Well, I know better," Esdeath thought to herself, her eyes half-lidded with doubt. "Sooner or later, I’ll hit a wall… a point where I can’t move forward without a second awakening."

She crossed her arms, leaning her head back as she sat in the chair, lost in deep thought.

“Maybe… maybe my system could help me grow even more. But I don’t trust it—not even a little,” she admitted quietly in her heart.

Her current goal was to gather 100,000 SP points. Once she had that much, she could delete the rule that stopped her from damaging the main plotline. If she did that, she would finally be half-free—free enough to make her own choices and still earn SP points by doing whatever she wanted.

But there was a catch.

Her star constellation—the mysterious being behind her system—was still unknown. She didn’t know what it truly wanted. Was it helping her? Or just using her? That question never left her mind.

And then there was the second awakening. It wasn’t something simple.

Esdeath was also deeply worried about corruption—it could twist her second awakening and turn her into something like a wolf , a vampire, anomaly.

But that would be the worst-case scenario.

Still there is a good chance she would still awaken a human without any issue.

“I think I should start with Predictor,” she thought next. “She needs more experience too. Especially with controlling her ‘Ultra Instinct.’ And the academy said we have to duel at least three people a week anyway… So why not start with her?”

Her thoughts were cut short by a sudden ding-dong.

The doorbell rang.

Yes—doorbell. Not many students had one, but Lortell had it specially made for them from dwarf kingdom. It had a soft, musical tone.

Esdeath and Selene both immediately stood up with a jolt.

They rushed to the door like excited little kids.

And just as Esdeath opened the door, both she and Selene jumped a little, spread their arms, and shouted happily in unison—

"Welcome home~!"

It had become a sweet daily routine for them.

At first, Selene had insisted on doing it like a real family. Esdeath had only agreed to play along for fun, but over time… it had turned into a warm habit. A peaceful slice of life they all cherished quietly in their own ways.

Esdeath never said it out loud, but deep inside, she didn’t want to stop this simple, happy routine. She knew that peaceful days like this might not last forever. In the future, they might not be able to live at one place for long. So why not enjoy it while they could?

Outside, Lortell was standing calmly, her long hair shining slightly in the soft hallway light. She smiled gently and bent her tall body a little to enter through the door.

Without a word, she leaned in and placed a soft kiss on Esdeath’s lips as a greeting.

Then she leaned forward and whispered warmly in her ear, "This makes all my tiredness disappear."

She smiled, and turned to Selene—who was already jumping in place.

Lortell lifted her up easily into her arms like she weighed nothing.

"You’ve grown again," she said, chuckling as she held Selene close.

"I’ll be as tall as you one day!" Selene said proudly with a sparkle in her eyes.

"I’m sure you will be," Lortell replied with a gentle smile.

She carried Selene into the living room and placed her carefully on the soft sofa. Then she sat down herself on the nearby sofa in the middle of the room.

Esdeath followed behind, her expression calm and thoughtful. She didn’t sit down—she stood silently behind Lortell, waiting for the right moment. She had something important to ask.

She wanted to tell Lortell to help her purify her blood… but before that, she decided to do something small and kind first.

She quietly went to the kitchen corner, took a plate, placed a few cookies on it, poured some water, and walked back to serve it to Lortell with gentle hands.

Lortell had been working all day. She wasn’t just an arch-duke of the kingdom, but also the vice-principal of the academy. Her days were filled with paperwork, decisions, meetings, and still, the moment she was free, she rushed home just to be with Esdeath.

Esdeath also handed her the newspaper. She knew Lortell didn’t get any time to read it during the day.

Lortell looked at the newspaper and let out a soft, tired laugh.

“I might be the only person who reads a newspaper at night,” she joked, brushing her hair behind her ear.

“It’s not like it’s your fault,” Esdeath replied quietly, her voice filled with warmth.

Lortell gave a small nod and leaned back. “Yeah… I guess we should go somewhere to refresh ourselves. Maybe a party, a short tour, or just a nice gathering.” She paused and gave a slight smirk. “You know, the House of Commons and the Parliament nobles throw parties almost every day. All they do is dress up and enjoy themselves. They don’t even work!”

Esdeath was about to say something, but before she could, Selene jumped in.

“I wanna go to the beach!” Selene shouted with excitement.

“Beach?” Lortell turned to her with a small laugh.

Selene nodded with her usual innocent voice. “Yeah! And a water museum! I wanna see all the fish—and the mermaids!”

Lortell couldn’t help but chuckle. “Pftt… Mermaids live deep in the sea. And it’s illegal to catch or force them into slavery, you know?” She looked at Selene with a teasing smile. “But maybe… if I ever go on a sea mission, I’ll try to bring you one to say hi.”

Selene’s eyes sparkled with happiness.

“But for now,” Lortell added, “It’s decided! We’ll go to the beach when I get some free time.”

“Yay!” Selene jumped up in joy, spinning a little in circles.

Esdeath smirked to herself but stayed quiet, enjoying the peaceful moment.

After a while, Lortell finished reading the newspaper and looked around the room. Even though it was filled with nice furniture and decorations, she felt something was missing. The silence felt too strong.

“Maybe I should’ve bought that thing from the Dwarf Kingdom,” she said with a sigh. “There’s so much entertaining stuff in it… and you can even watch movies at home without going anywhere.”

“You mean a television?” Esdeath asked, raising an eyebrow slightly.

“Oh, so you know?” Lortell looked at her in surprise. It seemed Esdeath knew quite a bit about other kingdoms.

But then Lortell’s cheerful face turned a little dim. “But there’s still one year left before the exclusivity ends…”

Esdeath knew exactly what she meant by that.

The Dwarf Kingdom’s technology was years ahead of everyone else. Their cities had tall, modern buildings. They had doctors who performed surgeries with magical tools. Guns, cars, televisions, even basic robots and simple artificial intelligence—it was all real there.

But the problem was a contract. The Awakened Kingdom and Dwarf Kingdom had made an agreement: any new invention from the Dwarves would first be given only to the Awakened Kingdom. Only after some years could the rest of the world buy it.

That’s why vintage cars only recently arrived in the Anastasia Kingdom, even though they were invented more than ten years ago. By now, the Dwarf and Awakened Kingdoms probably had flying cars or self-driving ones.

It was the same with televisions.

There was still one more year before the older models would finally be allowed to be sold outside. And even then, they wouldn’t get the latest versions—just the outdated ones.

Lortell bit her bottom lip, feeling annoyed.

“I hope they suddenly fall into big crisis they can’t escape from,” she muttered with a frustrated sigh, crossing her arms.

-----------------

 Neighbouring the Awakened Kingdom, there was a land filled with technology and wonders—the Dwarf Kingdom.

The cities of the Dwarf Kingdom were like nothing else. Tall buildings, The streets were clean and smooth, lit with bright street lights. Every home had satellite dishes on top, and the air smelled fresh, thanks to powerful water systems and clean energy from their powerplants.

Electricity flowed through every corner, and even at night, the cities looked alive. From glowing windows to shining billboards, the light never really disappeared. Families sat together, watching colorful shows on television. Some people danced and laughed at parties. Others leaned back in their chairs, enjoying music from the radio.

It all felt so peaceful. So modern. So full of life.

But then—everything changed in a second.

Without any warning, a blackout happened.

All the lights suddenly went off. Television screens turned black. The music from the radios stopped. Even the street lights blinked out, leaving the city covered in deep darkness.

People looked around in confusion.

“What happened?”

“Is the power out?”

“Did something break?”

No one knew what was going on.

And then… it became even stranger.

From every radio, from every emergency siren, and even from smart speakers in houses—a strange voice echoed. A cold, emotionless voice that filled the silence like a chill in the air. Despite being emotionless, It contained "Hatred", An unimaginable and un describable "Hatred",

"COGITO ERGO SUM."