Sakugan  

In a time far ahead, humans reside closely together in enclaves that are divided by rock formations. Beyond these enclaves lies an uncharted territory known as "The Labyrinth," which is expanding rapidly. Those brave enough to explore and map out this unexplored territory are referred to as "Markers." Among them is a young girl named Memempu, who dreams of becoming a Marker one day, and Gagumber, a former Marker who is now her father. Together, they embark on a journey through The Labyrinth!