> "Would you like to unlock your first dungeon?"
The words hovered in front of Seo Joon like an invitation—and a threat.
He accepted.
The world blinked. For a second, everything paused. Then the corridor twisted, folding in on itself. Rain faded. Stone replaced glass. And he stood in the heart of an underground tunnel reeking of rust and rot.
> "Dungeon Sync Initiated. Rank: F.
Environment: Urban Sewer
Goal: Eliminate 5 Spawnlings.
System Weapon Integration: Temporary Access – [Rusted Fang Blade]"
A sword appeared in his hand. It was light, familiar—as if he'd always held it. The blade shimmered unnaturally, yet only inside the dungeon did it feel real.
He moved through the dark.
Monsters emerged—small, twitching creatures with bone masks and exposed ribs. He fought, slowly, clumsily. No skills yet. Just movement and instinct.
By the fifth kill, he could feel the difference.
> "Core Stones x5 acquired.
Mana Stones x3 acquired.
EXP stored. Class Sync at 14%.
Dungeon Clear."
The system blade vanished. The world snapped back.
He collapsed just outside the gates. And standing over him was Arin.
"You survived."
He smiled weakly. "Barely."