Closed Room Mafia

Read Manhwa Closed Room Mafia:

Kang Chul-joing, a high school student, woke up in an unidentified locked room. He discovered an old MP3 while searching the room for anything to do in his disorganized state. He discovered that he was poisoned and that he just had three hours to live after reading the note left on the MP3. Normally a fan of mystery quizzes, Kang Chul-joong uses his years of experience as a reasoning skill to help him locate clues as he attempts to leave the mysterious room. But the ideal and the real world are not the same. When he made a string of errors and found himself in a dire scenario where the poison spread and he began vomiting blood, what was the last hint that he noticed? Presenting a brand-new survival game by “Struggle” and “Undead King” developer Baek Ji-woon! Is there a way out of this terrible hidden chamber?