There are some world-famous horror manga but only a few with truly mind-bending and terrifying stories that play tricks with readers' psyche. Manga fans have fine options of sites to read manga online and explore deeply emotional and thought-provoking dark manga stories that'll surely cause some sleepless nights and vivid nightmares. While these twisted stories are not the best manga for beginners, they do provide unique worlds, spine-chilling characters, and stories filled with plot twists for readers who are ready for mature manga.