Dangerous Dungeon Escape is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Go Insung did not pass onto hell or heaven after suddenly dying, but instead onto a dungeon. A place in between the afterlife and the world. And it’s no normal dungeon, but one with a system. While being watched by the numerous dead of the afterlife, Go Insung has to clear the dungeon with the other challengers in order to escape.