Ginga Teikoku no Metsubou Gaiden: Aoki Ookami-tachi no Densetsu  

Hot Space Cowboys, La leggenda dei lupi blu, Legend of the Blue Wolves, Legend of the Four Horsemen, The Legend of the Blue Wolf, 銀河帝国の滅亡・外伝 蒼き狼たちの伝説, The Legend of the Blue Wolves

In 2199 A.D., overpopulation has led humans to adapt to living on other planets for nearly a century. However, everything changed when they took control of Pluto and discovered a new threat known as the Apocalypse, a creature that uses human brains as its source of knowledge and energy for their mechanical bodies. Now, humans must fight to survive, and as a last resort, they send off trained soldiers to reclaim Pluto and eliminate this new danger to mankind. At the base, Lieutenant Jonathan Tyberius and Leonard Schteinberg fall in love after experiencing many tragic events, but unfortunately, they were forced to go their separate ways due to the ongoing war.