The APOSIMZ manga by Tsutomu Nihei has concluded its serialization in the October 2021 issue of Kodansha’s Monthly Shonen Sirius magazine.
The story of the manga is described as:
This story takes place on the frigid, massive artificial planet known as Aposimz. Eo, Biko and Etherow, residents of the White Diamond Beam, are in the middle of combat training when suddenly a girl appears, Rebedoan Empire soldiers in hot pursuit. The girl asks for their help in keeping safe a “code” and seven mysterious “bullets.” This chance encounter marks a major shift in the fate of the entire planet…
Nihei launched APOSIMZ in Monthly Shonen Sirius magazine in February 2017. Vertical is releasing the manga in English.