War Chronicles of the Land of Twilight

This reincarnation (or more accurately, summoning) was certainly not something I did of my own will. In the “Land of Twilight,” there is a witch who excels in the magic of transposition. It was by chance that my soul happened to be forcibly transposed to this side by that person’s hand.

At the time, being newly summoned, I thought I had a rough idea of what the transposition magic was all about, but the truth is that it requires an incredibly advanced knowledge and technique. Looking back to when I was summoned, I now realize just how remarkable that witch’s actions were. To transpose a soul from another world and have it take root in this world is an achievement that I, in my lifetime, could never hope to match.

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My life story will continue a bit longer, but before that, let me briefly explain about this world.

There are two major forces in this world. The first is the “Demon race” that I was reincarnated into, and the second is the “Humans” that I was before my reincarnation.

The Demon race and Humans live in completely separate worlds, each with their own country. The country where the Demon race resides is called the “Twilight Country,” while the country where Humans reside is called the “Rising-sun Country.” Essentially, there are only these two countries in this world, with the Rising-sun Country occupying 80% of the land, and the Twilight Country occupying the remaining 20%.

The Demon race is very long-lived and has higher basic abilities compared to Humans. However, their reproductive capacity is significantly lower, and their numbers are overwhelmingly smaller compared to Humans.

In the past, there was an era where the Twilight Country occupied 40% of the land and the Rising-sun Country occupied 60%. However, during the reign of the current ruler of the Twilight Country, his Majesty “Fuchikami,” they have not allowed their territory to be invaded and have not invaded the Rising-sun Country. Instead, they have stubbornly held onto their existing territory. At least, that’s what I have heard for the 400 years since I arrived in this world.

When people hear the term “different world,” they may think of legendary creatures such as dragons, but there are almost none of those creatures (although they do exist). There are countless creatures classified as “creatures” or “monsters” from the perspective of humans, but there are no beings that wield unreasonable, calamitous powers.

To put it simply, it is like imagining a world in a fantasy game without bosses. Oh, that’s a nostalgic example.

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Roughly summarizing, the basic structure of the world I’m currently in is as follows.

Now, let’s return to my personal story.

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Right after my reincarnation, I begged the witch who summoned me to teach me about magic, due to the impulse caused by the complete retention of my memories from my previous life. It was a rush of emotions from the relief of escaping repression, the excitement of starting anew in a new world, the special feeling of having a demon’s body, and the existence of magic. Essentially, I was so overwhelmed that I became high on excitement.

However, despite my pleading, the witch dismissed me, saying that she only summoned me as part of her research and had no interest in me personally. She had no intention of taking care of me, as she assumed the demon army would provide for my basic needs. In other words, she rejected me by saying something along the lines of “I won’t be looking after you, the army will do it for me.”

So, the demon army took me in, and for the first 40 years after I arrived in the country of Yoi, I dedicated myself entirely to honing my martial skills within the army.

When a person continues doing something for 40 years without distraction, they inevitably become an expert in that field. Even someone like me, who had no experience with martial arts, could reach a considerable level with that amount of time.

After rising through the ranks in the demon army, I visited the witch who summoned me after 40 years. In the demon world, 40 years is equivalent to just a few years or even months in the human world. Seeing how much I had grown in that short time, the witch showed an interest in me.

Finally, after waiting for 40 long years, I became an apprentice to the witch who summoned me and started learning about magic.

The following 40 years were spent solely on the pursuit of magic.

Although I was reincarnated as a demon in Yoi (land of twilight), my appearance was identical to that of my previous life. During my 40 years of military training, I had not aged at all, experiencing firsthand the longevity of a demon’s body.

As I continued studying magic under the tutelage of the witch, I learned that factors such as appearance and personality were determined by the “soul,” an entity commonly referred to as such. This was the reason why my appearance was exactly the same as my previous life.

I learned that the entity called the “soul” is said to be situated at the boundary between pure magical power (the fundamental essence that permeates the world) and consciousness/ego (something that enables individuals to exist as individuals). Although there are some parts that I myself don’t quite understand, it seems to be something along those lines.

As a demon who was reincarnated with the shape of a human soul, my master, a witch, told me that I possessed an “unusual potential.”

Earlier, I mentioned the differences between demons and humans: demons have longer lifespans, higher basic abilities, and a smaller population, while humans have shorter lifespans, lower basic abilities, and a larger population. However, there is one more fundamental difference between the two races.

That difference is “the speed at which they grow.”

Due to their longer lifespans and higher basic abilities, demons have a significantly slower growth rate. On the other hand, humans, with their short lifespans and lower basic abilities, can grow at an astonishingly fast rate. “Growth” includes physical elements, but mainly refers to mental elements such as knowledge and techniques.

In short, I gained a “longevity and high-potential body while maintaining the human perception of time.” To put it in normal human terms, it was equivalent to gaining eternal life and a perpetually youthful body.

It takes 30-40 years for a human to master a single field. In other words, “humans can only master two fields at most during their lifetime.”

On the other hand, although demons have very long lifespans, their slow growth rate means that “demons can only master two fields at most during their lifetime.”

However, by obtaining a demon’s body while retaining a human soul, I broke free from the limitations that were originally imposed on both humans and demons. “By maintaining the greed and rapid growth rate of humans and being released from the constraints of lifespan, I gained the possibility to master every field.”

Eighty years after my reincarnation, I had mastered martial arts in the first 40 years, and in the next 40 years, I learned the basics of my master’s teleportation magic.

In the following 20 years, I devoted myself to the development of applied techniques that combined martial arts and magic. Research into applications after solidifying the foundations progressed at an accelerating pace.

It was at that moment that the initial version of the “Demonic sword,” a unique tactic that combined swordsmanship and teleportation magic, was born, which later propelled me to the highest position among the demons, the “Four Great Leaders.”

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Well, I thought I was going to keep growing at an unstoppable pace, but after crossing the 100-year mark since my reincarnation, I hit a major wall.

That wall was the “limit of the human spirit.”

Despite having a body that is close to being immortal, what resides within is the soul and spirit of a human. The limit of the time that this can endure came around the 100-year mark.

My mind suddenly became unstable, on the verge of collapse. The fear that overflowed from my mind drowning me, creating a chain reaction of terror that led to further destruction. I desperately searched for a way to control it.

And then one day, I discovered a solution. It was the same therapy that I had applied when I was human and struggling with mental illness before my reincarnation.

It was “watching anime.” (TL: Wtf bruh)

When my mind could no longer keep up with my long-lived demonic body, the “otaku” part of my soul suddenly cried out, “Oh, I want to watch anime. Oh, I want to play online games.”

And from there, my true pursuit and the awakening of my true power began.