Ginga Teikoku no Metsubou Gaiden: Aoki Ookami Tachi no Densetsu

It is the year 2199 A.D. and overpopulation has forced mankind to go to other planets. For close to one hundred years, the human race has thrived happily in their home. But that soon change when humans took over the planet Pluto, as a new race was discovered, The Apocalypse, a creature that can use the human brain as a source of knowledge for their mechanical bodies. Now the humans have to fight to survive, Jonathan Tyberius and Leonard Schteinberg, two gay men fall in love but have to go their separate ways due to the war.