GremoryLand

 is a Horror Webtoon Original created by A.Rasen; it updates every Saturday.

Synopsis
''Six old school friends are invited to be the first visitors of GremoryLand, a new horror theme park that promises an experience as unique as it is spooky. But once this experience starts there is no turning back, and they find themselves tested beyond what they imagined, facing their most desperate fears in order to survive.''

Related

 * Melvina's Therapy: Same creator