ItachiVak

After causing a tech disaster in the real world, genius shut-in Rin Katsuro is sentenced by the gods and banished to Ereborn—a realm ruled by chaos, where ancient scripts control magic and dungeons feed on trauma.

He wakes up in the body of a legendary war criminal—the Demon King's General—and is mistaken for the adoptive father of a demon princess.

Armed with unstable “Error Magic” that lets him rewrite reality like code, Rin doesn’t want to be a hero... but when angels declare war on the demon races, and his daughter calls him “Papa,” he might just rewrite fate itself.

This is the story of a broken man with nothing left to live for—until an entire world starts calling him Dad, Demon, and Destiny.

I Was Banished from Heaven, Now I’m the Demon King’s Stepdad?!

Rin sat alone, cloak wrapped around his shoulders, a system screen flickering in the air.

The voice still echoed in his head.

> "Rin… why did you abandon us…?"

> "You died. You all died. I saw it happen."

> "No. We were… taken. Fragmented. Stored."

> [Echo Detected – Data Fragment: "Saki Hoshino"]

[Soul state: Incomplete. Preserved in System Vault Beta.]

[Current Location: Unknown. Traced to: Core 2 – The Obsidian Vault]

> Saki's not gone. She's part of the system now.

> "I'm gonna bring you back. I swear."

☀️ Morning – Training Ground

> "Papaaa, I dreamed the kitchen exploded."

She looked over. The kitchen was still on fire.

She kicked at the dirt. "I'm not good at anything…"

Rin crouched beside her. "Lilith. You're a walking nuke with emotions. You're incredible."

He pulled out a tiny glowing stone.

> "Wanna help Papa find ancient relics inside a potentially unstable dungeon made from corrupted trauma?"

Lilith tried channeling her mana to locate hidden Core fragments.

She poured way too much into the ground…

[Rift Activated: Sub-Dungeon "Heart of the Broken Child"]

Rin grabbed Lilith and jumped back as a vortex of glowing red code spiraled open beneath their fortress.

> "I told you to focus your mana—not rip a hole in the world!"

⛓️ Dungeon Dive – Inside the Core

They entered a dark void—walls flickering like TV static. The place felt wrong.

Voices whispered. Old memories. Forgotten pain.

At the center stood a crystal platform with a black orb floating above it.

> [You have found: "Fragment Core 1 – Root of the Broken Code"]

[Warning: Memory Echoes are unstable. Boss imminent.]

Suddenly, a figure emerged—a corrupted version of Rin with empty eyes.

> "You can't fix this world. You're just a selfish coward who couldn't save anyone."

Rin's jaw clenched. "I've heard enough."

> [Skill Activated: "Reality Script Editor"]

[Command: Rewrite(EnemyType, "Training Dummy")]

The Core absorbed into his body, glowing in his chest.

> [Core 1 Acquired. Total Fragments: 2/12]

[Passive Upgrade: "Script Memory Expansion"]

⚔️ Meanwhile – Aikawa's Blessing

At the center of the Divine Empire's cathedral, a golden archangel hovered over Aikawa.

> "You have been chosen, Kento. Wield this to purge the bug."

> [Weapon Granted: Holy Artifact – "System Cleaver"]

[Effect: Deletes any line of code. Bypasses Error Magic.]

Aikawa grinned, drawing a glowing blade made entirely of divine script.

> "I'm coming, Rin. And this time, you won't be the one playing god."

Rin and Lilith exited the rift as it closed behind them.

Lilith tugged his arm. "Did we just beat a dungeon?"

> "Yeah. And now the system probably hates us more."

> Saki's soul is out there. Aikawa's coming. And the gods are watching.

> I'm not just fighting for this world anymore… I'm fighting for everyone the system erased.

He put his hand over his heart, where the Core pulsed.

> "Let's start crashing it. One bug at a time."

Chapter 7 – “She’s Still Alive Inside the Code”