Caravan 97 is a Manga/Manhwa/Manhua in english language, GORE 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

Nova and Vidia, brother and sister, are part of Caravan 97, in charge of rebuilding human civilization from within the borders. However, due to technical mishap, they were forced to go to the Outside World for the first time. Haunted by the mysteries of the world and past trauma, the twins must fight together through the dark and dreary life at the end times.