Three Sides of a Shadow

In humanities far future we will travel the stars and encounter many forms of life. Among them are the Seku, a race of mammalian creatures that live on a planet just a few light years from our own named Eru. Here a fight rages to control a precious material unique to Eru Erunite. Which powers some of the planets greatest warriors. Including the broken warrior who has forgotten his former life Ryo Kusanagi.