Mugen no Ryvius

It is the year 2225AD - 80 years after a tremendous solar flare created dangerous areas of high gravity in space. This area of plasma called the "Geduld" ends up linking the plants together like one giant nervous system. But this danger did not stop mankind from populating outposts along the Geduld. During a routine dive procedure, the outpost Liebe Delta is severely damaged forcing all the astronauts in training into a space ship to escape the deadly Geduld plasma. Based on the dramatic and popular sci-fi anime thriller, Infinite Ryvius the manga is about a ship full of teenage cadets lost in space desperately trying to get home while dealing with the inner strife and egos of each other.

(Source: DrMaster)