In this world, beings known as Heroes exist.
The righteous kind of Hero that most people imagine—one who wields a single sword and subjugates the Demon King alongside many companions.
Accordingly, Heroes are accompanied by great glory, respect, and honor.
But even such Heroes are, at their core, human.
Creatures who grow up within the community called family, and later create a community called family of their own.
They give birth to children who resemble both themselves and their spouses, living out their remaining years in happiness.
—that was how I thought things would mostly unfold.
On top of that, I'm the son of a Hero!
Hahaha!
So, my birth celebrated by countless people—
"Y-Young Master...! You mustn't run...! Y-you'll get hurt...?!"
"Has Young Master Kael run off again? *Sigh.*"
"He's usually so well-behaved, but he keeps running away whenever it's history time."
"Isn't there any way to persuade him? At this rate, we'll be killed by the Hero and have to spend days regenerating our bodies!"
"Ahem, no matter that it's Young Master Kael, we must catch him. Even if he is a boy and rather frail, he is the Hero's son, so his strength must be considerable."
"Both male monsters and human men—despite the genetic limitations of being male—the young master is young and a boy. Please make sure to catch him."
"Yes!"
A history where the Demon King and the Hero join hands?
The world has become peaceful, and monsters too are capable of normal diplomacy?
There's no way such history... could actually exist!
A Hero stands against the Demon King for justice, and the Demon King tries to kill the Hero to drown the world in darkness.
Isn't that the normal development...?
I ran out of that distorted brainwashing—history lesson, hurriedly latched the main gate, and fled outside.
Why on earth do I have to learn such broken history!
Fortunately, perhaps thanks to my small frame, I managed to slip through the gaps and escape.
In my previous life, my frame was so small that I always walked with my head down, but still.
I escaped from the dark, torch-filled mansion and lay flat on my back on a soft, fluffy lawn.
With the warm sunlight shining down on me, what a wonderful day this was?
If I just took a short nap here, the teacher would eventually give up and come to get me.
So, closing my eyes and feeling the warm breeze...
"So you were here."
"Uwaaah!?"
Just as I was feeling cozy.
I was startled by hands that suddenly lifted me into the air.
I kicked my legs about and turned my head.
"Who is it, I'm the Hero—"
"Mhm~ Our son is indeed the Hero's son. Mm."
"Ah, Mom..."
Mom, wearing a bright smile.
Ears that weren't pointed.
Round eyes.
Fair skin.
A face and eyes exactly like mine gazed quietly at me.
"Isn't it time for your history lesson? Then why are you lying down here where Mommy trains?"
"Ah, no... They only teach weird things! How could a Hero and a Demon King get married and have a baby...!"
"That's how you were born."
"Eeeh..."
As if familiar with how I looked like this, Mom sighed and pulled me into her embrace.
In her embrace that was so warm and cozy, my desire to resist ultimately melted away.
"B-but clearly... Mom was an incredibly strong Hero... and monsters trembled in fear..."
"That's why the head butler is so afraid of Mommy. Now, now, you need to go to history class. Let's go back to your teacher."
"It's super weird getting lessons from a skeleton!"
"Dear me, it's because he's lived for so long that he can teach Kael about history."
"My swordsmanship teacher is a Dragon, and the head butler is a Dullahan!"
"Mhm, they're all teachers appointed by Mommy, right? They were quite strong, those ones."
I couldn't object to what followed.
My mom, who single-handedly subjugated the Demon King... and established a peace treaty.
The story behind it all was that she had actually loved the Demon King she was thought to have subjugated, and the fruit of that love was me.
"Ugh... How unfair..."
"That's exactly what Daddy said when Mommy beat him for the first time—what a fond memory~"
My mom, the Hero, and my dad, the Demon King who has since perished.
And a world where war with monsters no longer exists.
Into such a world, I had ended up possessing the body of the son of the Hero and the Demon King.