The Adventures of Rock

A celestial body, Deimon, approaches Earth, but gets caught in its orbit. Scientists believe it to be habitable, so an exploration is sent out to check. However, when they leave, two members are left behind - Rock and Daisuke. The two discover two races on Deimon - clay men known as Luvoroom and birdmen named Epoom, where the Epoom have the Luvoroom enslaved under them. Initially, Rock is treated as a slave, but after he does something astounding...

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Volumes 7 and 8 of the Osamu Tezuka Complete Works