Seikai no Monshou

Seikai no Monshou summary:

Planet Martine is suddenly attacked! The alien invaders are known as the Abh. They are of human origin, but have been genetically modified so that each Abh has superior talent, skill, beauty, and longevity. Martine’s president surrenders completely in the face of the Abh’s awesome military power. Through a bizarre twist of fate, his son Jinto becomes a n.o.bleman in the Abh’s vast, intergalactic empire.