I'm Going to Kill the Monsters That Swallowed My Friend

When a beloved friend vanishes into the shadows of Korea's cutthroat entertainment world, the one known only as Number 13 descends into the sinister Gangnam underworld of Labyrinthos, hunting the monsters responsible - and risking being consumed by the same darkness.

Original Novel:
Aladin, KyoboBook, Yes24

Official Translations:
English