A thick layer of mist shrouds the world and turns people into zombie-like monsters. Without knowing its cause or the solution, the only way out is to sneak into the capital city built for the privileged. While struggling for survival, Hayeon, a talented biologist, finds out that his crush Myung Woon has something to do with the virus...

Original Novel

Original Webtoon:
Main Story (R15):
Bomtoon, Ridibooks, Lezhin, MrBlue, Kakaopage, Naver Series, BookCube
Side Story (R19):
Ridibooks, Lezhin, MrBlue, Kakaopage, Naver Series, BookCube

Official Translations:
Main Story (R15): English, S.Chinese, French
Side Story (R19): English
R19 (Main and Side Story): Thai, Japanese (Beltoon, Lezhin, Comico)

Note: The Webtoon released as R15 in the main story, it's not R19 like the Novel.