Chapter 1 – The Hero and the Demon King
I remembered everything from my past life—our childhood fights, late-night gaming sessions, and how I always tried to protect him. Arslan was reckless but kind-hearted. And now, in this world, he had been reborn as the Hero of Light, destined to save humanity by killing… me.
I laughed bitterly."Really, fate? You want me to kill my little brother, or let him kill me?"
But I wasn't going to follow the script. I would not be the villain this time.
So I began changing the Demon Lord's castle. I ordered the demons to plant gardens, study books, and even build schools. Of course, they thought I'd gone insane.
Yet rumors spread across the kingdom:"The Demon King is… feeding orphans?""The Demon Army is helping farmers?"
But no matter how much I tried, I knew Arslan would eventually come for me.
Chapter 2 – The First Encounter
It didn't take long. One night, under a blood-red moon, I sensed him at the castle gates. Sword in hand, holy aura blazing, my younger brother stood with a party of knights.
His eyes widened when he saw me."Brother…?!"
I smirked. "Yo, Arslan. Long time no see."
He trembled. "How… how are you here? You're supposed to be… the Demon King!"
"I am. But I'm still your big brother first."
The knights were confused. A demon king calling the hero his little brother? Impossible. But I waved my hand, sending them flying gently with magic. Only Arslan and I remained.
We didn't fight that night. Instead, we argued—about duty, destiny, and whether the world could truly change without war. He believed killing me was the only way. I believed protecting him was.
Chapter 3 – War Between Blood
As months passed, our bond was tested again and again. Arslan's companions saw me as evil. My demon generals demanded war. We clashed in battlefields, brother against brother, light against darkness.
But each time our swords crossed, I whispered to him:"Arslan, don't lose yourself. Don't forget who you are."
And slowly, his heart wavered. He began questioning the Church that branded me evil.
Chapter 4 – The Truth of the World
Eventually, we uncovered the truth. The gods themselves had cursed the world into an endless cycle: heroes would rise, defeat the Demon King, and peace would last only a generation before chaos returned. I wasn't truly evil. I was simply a sacrifice created by the gods—a role forced upon me.
Arslan clenched his fists."So… if I kill you, the cycle begins again?"
"Exactly," I said. "Which is why I refuse to fight you, brother. I'd rather bear the title of villain forever than see you trapped by fate."
But the gods would not allow rebellion. A false light descended from the heavens—a "Heavenly Knight" sent to erase us both.
Chapter 5 – Brothers United
For the first time, Arslan and I fought side by side. My demonic flames and his holy sword clashed against the celestial enemy. Back to back, just like the old days when we played games together, we fought as brothers.
"Arslan!" I shouted. "Strike now!"
He leapt, his blade glowing with the light of hope, and I poured all my demonic power into it. Together, we shattered the chains of fate, destroying the false god.
The cycle was broken.
Epilogue – A New World
The world no longer needed a Demon King or a Hero. Humans and demons, once enemies, began building a new future together.
Arslan became a wandering knight, helping both races rebuild. I stepped down from my throne, finally free, and watched over him from the shadows—not as a villain, not as a boss, but as the older brother I always was.
And in that moment, I realized—I didn't reincarnate to play the final boss.I reincarnated to protect my little brother, no matter what.