SUMMARY

Discover Prison Guard Zero manga on Mangaoi – your trusted place to enjoy the best manga online for free. This series is among the most talked–about titles, blending unique storytelling and captivating artwork that keeps readers coming back.

All chapters of Prison Guard Zero are being translated and updated regularly, so you’ll never miss the latest release. Add this manga to your bookmarks or sign up for a free account to get instant updates whenever new chapters drop.

Start reading today and join thousands of manga fans who are already following Phantom Thief Sapphire!

Description: Read manhwa Prison Guard Zero / 제0 교도관 / 0th Correctional Officer Ji-hun, a former member of a secret special forces unit under the Special Operations Planning Office of the South Korean Army Headquarters, returns from a long overseas deployment— only to receive the news that his younger sister Ji-yun has died, and that the person accused of killing her is none other than her boyfriend, Seo Min-jun. While still struggling to accept the fact that his sister is gone, Ji-hun, who trusted Min-jun, learns that Min-jun was falsely accused and had gone to Yeokseon Prison in search of Ji-yun’s real killer. But eventually, Min-jun also meets his death inside the prison. Determined to uncover the truth behind the unjust deaths of both Ji-yun and Min-jun, Ji-hun becomes a prison guard and heads to Yeokseon Prison to uncover the secrets hidden within..