The Demon King Who Raised A Hero

Chapter 1

The hero killed me once.

Now he calls me brother and trusts me with his life.

Death hurts more the second time.

The first time, it was fire and steel and a blade driven straight through my chest by a man who believed he was saving the world. I remember the cheers afterward, the sky split with divine light, the gods watching from above as if they’d just enjoyed a performance written for them.

The second time, there was no blade.

There was only breath rushing back into my lungs like an insult.

I gasped.

My eyes flew open, sucking in air so sharply my ribs burned. The ceiling above me was unfamiliar—polished stone carved with noble sigils, not the scorched obsidian throne room where I’d last stood. Sunlight spilled through tall windows, soft and warm, mocking the memory of my execution.

I wasn’t dead, that was my first thought.

My second was worse when I remembered everything.

The battlefield. The hero’s face twisted with determination, The way my warning died in my throat was because the gods had already sealed the truth away. I remembered kneeling, not because I’d been defeated but because I’d been exhausted. Because I’d thought, foolishly, that reason might still exist in that world.

Adrian—no. That was his name then. The hero.

He hadn’t hesitated.

My fingers curled into the sheets beneath me. They were small-Too small.

I sat up too fast, dizziness crashing into me. My body felt wrong—lighter, weaker, untested. I raised my hands in front of my face and stared.

It was a child’s hands, Smooth skin, no scars, no burn marks from divine punishment. No blackened veins from the demonic core I once ruled with absolute control.

A sharp laugh escaped my throat before I could stop it.

“Of course,” I muttered hoarsely. “This would be my punishment.”

A second life.

I slid off the bed, bare feet touching a marble floor cool enough to shock clarity into me. The room was large—lavish, and Noble. Heavy curtains embroidered with a crest I didn’t recognize. A sword hung on the wall, ceremonial, unused.

I staggered toward a mirror.

The boy staring back at me was maybe ten years old. Dark hair falling into sharp eyes that didn’t belong to a child. My face—this face—was too clean, too unmarked. But the eyes were the same.

They had always been my curse.

“Kael Varyn,” I whispered.

The name surfaced instinctively, settling into place as if it had always been mine. Memories not my own slid into alignment—noble lineage, political dinners, etiquette lessons I’d hated, a mother distant but calculating, a father already dead.

So, a noble’s son not a demon king, not yet.

I closed my eyes and reached inward but nothing answered.

No roaring demonic core, no endless well of power that bent armies and terrified gods. Just… emptiness. Or worse—something sealed so tightly it might as well not exist.

I exhaled slowly.

“They didn’t destroy me,” I said to the empty room. “They buried me.”

A shiver ran through me, not from fear but understanding.

The gods never wasted effort.

If I were alive, it was because they wanted me alive, or because they thought this body, this time, this world… would break me before I ever became a threat again.

I straightened.

They had underestimated me once before.

A knock sounded at the door.

My body tensed automatically, instincts older than this life screaming caution. I forced myself to relax, schooling my expression into something appropriately youthful.

“Come in,” I said.

The door opened to reveal a maid, her posture respectful, eyes lowered.

“You’re awake, Young Master Kael,” she said. “The physician said the fever would pass, but Lady Varyn asked to be informed immediately.”

A fever....Convenient.

I nodded. “I’m fine.”

She hesitated, then smiled gently. “Your brother will be glad to hear that.”

My heart stopped.

“…My brother?” I repeated.

The maid blinked. “Yes, Young Master. Lord Eron has been waiting outside since dawn.”

The room tilted.

No, the world had a cruel sense of humor, but not this cruel.

I swallowed. “Send him in.”

The maid bowed and left.

I had just enough time to steady myself before the door opened again.

He stepped in quietly, as if afraid I might disappear if he moved too fast.

A boy, a year or two younger than this body. Light hair, eyes too bright for someone raised in a noble house. There was an awkwardness to him, the kind born from sincerity rather than weakness.

But it wasn’t his appearance that froze me.

It was the weight around him.

Faint, dormant, and familiar.

Holy power. Not active—not yet—but coiled around his soul like a sleeping blade.

I knew that presence better than my own heartbeat.

The hero, my executioner reborn as my brother.

Eron smiled when he saw me. It was wide and relieved and painfully genuine.

“You’re awake,” he said. “Mother said I shouldn’t bother you, but...” He stopped himself, rubbing the back of his neck. “I was worried.”

For a moment, the room was silent.

A thousand years ago, this boy had stood over my kneeling form, sword shaking in his grip, eyes burning with belief.

Now those same eyes looked at me with nothing but trust.

I felt something twist in my chest.

“I’m fine,” I said carefully. “Just tired.”

Eron nodded quickly, accepting the lie without question. He always had, even then. That was what the gods had used against him.

“I brought you this,” he said, holding up a wooden practice sword. “Father said you’d teach me when I was older, but… maybe now?”

I stared at the sword. The irony was almost funny.

I rose slowly, testing my balance. Weak, Fragile, and human.

“Yes,” I said. “I’ll teach you.”

His face lit up. “Really?”

“Really.”

Because if I didn’t, someone else would.

And they would shape him into the weapon that killed me once already.

As Eron chattered excitedly, explaining how the knights said he might train early, I studied him closely. The way his presence subtly pulled at the air. The way the light near the window seemed brighter around him.

The gods hadn’t abandoned him, they had simply pressed pause.

I placed a hand on his shoulder, feeling the warmth there, grounding myself.

Listen to me, gods, I thought.

You took my crown, you took my voice and you rewrote my death into a legend.

But you made one mistake, you brought us back together.

Eron looked up at me. “What’s wrong?”

I forced a smile. “Nothing.” But deep down everything was wrong.

Outside, bells began to ring—morning prayers from the city below. A reminder that the churches still ruled, that divine eyes still watched, that my soul—demonic, condemned, unforgettable was likely already marked.

If they sensed me fully, I would die again.

And this time, I wouldn’t be allowed to reincarnate.

I squeezed my brother’s shoulder gently.

“Eron,” I said, “no matter what anyone tells you… remember this.”

He tilted his head. “What?”

“Strength isn’t about who the gods choose,” I said quietly. “It’s about who you choose to protect.”

He nodded solemnly, as if I’d given him a sacred vow.

“I’ll remember,” he said.

I looked into the eyes of the man who had killed me once and felt a grim certainty settle in my bones.

The catastrophe was coming.

The gods were still lying and the hero was standing right in front of me, smiling.

This time, I would raise him myself.

And when the heavens finally fell-I would be ready.