I reign supreme in the Western fantasy world for eternity.

There's no toilet paper, magic is indiscriminate, and the demons' language is incomprehensible.

You might not believe it, but the customs and traditions of humans in this world are far less simple and honest than those of demons.

At least when demons want to kill you, they will act directly. Human nobles will poison your wine, stab you in the back, or send assassins to kill you while you sleep, and then publicly mourn your "untimely death."

During my first year traveling through the human kingdoms, I was "warmly entertained" by three nobles, and each time I almost lost my life there. But to be fair, attending my own funeral was quite interesting.

Of course, ordinary people did it too.

Perhaps it was because of the bad social atmosphere, but when I was selling trinkets at a market in the human kingdom, I was robbed seven times in three days, extorted five times, and once even staged a street accident where someone claimed I stepped on their family's ancestral ants.

Ants! An heirloom!

I was so angry that I wanted to turn around and go back to the Demon King's castle to farm.

So, if you're still hesitating about whether to pull out that holy sword—first think clearly about who you're pulling it out for.

Okay, rant over. Now let's talk about my unlucky teammates.

Merlin.

He's a genius, a true genius, smarter than anyone I've ever met.

His understanding of magic went far beyond simply "making a fireball" or "creating a shield." He always felt that magic should be able to be used to fly to the stars and the sea. I studied it with him for a while, and he kept talking about "whether magic could send people to the moon."

I don't know how he is now, but I believe he has probably become the person in the world who is closest to the stars.

……

That elf, sigh... Elune, she's a hidden master, pretending to be weak while actually being strong.

She seemed to have some feelings for me, but unfortunately, my magical talent is mediocre, my lifespan is limited, and I have no desire to live by transforming myself into an elf.

I admit I chickened out. That "elf transformation magic" sounded so unreliable, so I decisively hid in the Demon King's castle. At least there she wouldn't chase after me and try to persuade me to change my race.

But I also know that her feelings were genuine, but unfortunately, I couldn't accept them.

This damn theory about lifespan actually applied to me. I thought it was pretty romantic when I watched anime in my past life, but now I realize how torturous it is.

If only I could cultivate immortality.

……

The dwarf is a man of strong emotions, rough around the edges but meticulous in his details, and possesses a great sense of the big picture.

When he was with me back then, he seemed like just a rough guy who loved to drink and fight. But I later discovered that he was one of the most visionary people I've ever met.

He later became the first High King of the Dwarves, which made me very proud for a long time.

By the way, I was the one who came up with that dwarf joke that might still be circulating on the mainland today, "Isn't your High King even as tall as me?"

At the time, I didn't know how long the kingdom established by the dwarves could last. After all, the various dwarven tribes had been fighting for countless years without a unified leader. Who knew if they would start fighting each other again?

So I thought of using hellish jokes to make the title "Supreme King" cyber immortal.

As for whether he is actually taller than me... I think, given that guy's personality, he would probably laugh and slam his fist on the table, saying, "You wait, I'll have someone raise the throne by five inches."

……

The priest Hermes was a man with exceptional divination talent, but there were two things he couldn't divine: me, who wielded the Holy Sword, and Elune, the elf of higher rank than him.

This made him very anxious, because he always felt that "things that should be divined but cannot be divined" was itself an anomaly, and this anomaly might foreshadow something bad.

I spent a lot of time trying to convince him that the world isn't entirely covered by prophecy; he's just not quite willing to accept it.

At that time, the aristocratic atmosphere in the human kingdom was so bad that even I, as a time traveler, found it outrageous.

The church turned a blind eye to this, and even condoned this trend to some extent.

Before disbanding the Hero Squad, I specifically talked to him about this issue. We had a heated debate about the argument that "demons are more humane than humans."

He was rendered speechless by my arguments, and after much reflection, he decided to dedicate himself to church reform. By the time I wrote this letter, he had become the Pope and had already reformed most of the bad aspects.

If you were to travel directly to the human kingdom and not be burned to death for your strange actions, it would most likely be thanks to him.

Now that we've finished talking about them, let's get down to business.

I suspect that the hero's slaying of the demon king was merely a game created by the gods for some purpose, and that the demon king was able to sense the hero drawing the holy sword at the same moment.

I think the Demon King and the Hero are a pair of star-crossed lovers!

The problem is that, as the first hero, I went to the Demon King's castle to help the demons build their home, and those gods didn't intervene at all.

This made me realize that things weren't that simple.

Perhaps they find it more interesting this way? Perhaps they don't care who the hero killed or helped? I don't know.

I pestered Elune for a long time to ask her, but unfortunately she couldn't answer. She even suggested that I go to see the Goddess of Life five hundred years later and let her tell me herself.

She then promoted her "elf transformation magic" again, saying that "once the transformation is successful, lifespan will directly increase to the same level as an elf."

Isn't this the "magic trick"? Her words almost triggered my PTSD. I immediately said, "Death isn't scary..." and told her to stop, and she actually did.

Well, I'm sorry, even though we haven't seen each other for many years, I still can't help but mention her.

Closer to home.

The main purpose of this letter is to vent to you about this world that I love, and to remind you that the connection between the hero and the demon king is not as simple as you think.

However, I haven't fully figured out exactly how complicated it is yet, so just be careful.

The real gift I'm leaving you is the world I've directly or indirectly influenced, the other blueprints I placed in the Demon King's castle, and the "Great Treasure" which gathers together the treasures of the evil dragons I've slain.

The letter includes a map; just follow the clues in the text to find it. The cipher text is a title for a secret treasure from some anime. As for which title it is…

I think with your intelligence and the amount of film you've watched, it shouldn't be hard to guess.

I used the dragons' own cipher system, and the decryption method was based on the way of thinking in my world, so you should be able to understand it.

Finally, my only request is: if you ever meet my elven teammate, please ask her if she remembers having such a brave party leader.

After all, I don't want people to forget me hundreds of years after I die!

Just write the result on a piece of paper and burn it for me. It would be best to burn it in the Demon King's Castle, since my grave should be there.

Don't think I can't do anything to you just because I'm not very talented in magic. I can ignore any sure-hit area that negates a sure-hit effect, even if it means I get hit myself.

[Manual transmission breathing]

Haha, just kidding.

What I want to say is: the one who doesn't help me is gay.

—The first hero, in the Demon King's study, late at night.