Ultima: The Maze of Schwarzschild

Ultima: The Maze of Schwarzschild ウルテイマ ～ シュワルツシルドの迷宮 (Urutima ~ Shuwarutsushirudo no Meikyun) is an Ultima-inspired  manga created by artist Seiji Tanaka. It was published on November 15, 1991 by JICC and originally sold for ¥980.

Synopsis
The manga is a direct continuation of the "Exodus" manga. Aida and Lennon have resurfaced in Genji's outer-space "homeworld," under new identities as caretakers of a space station. But so have Mondain and Minax -  as scientists who have discovered the remnants of Exodus trapped within an asteroid and seek a way to unseal him.

The hero Genji is shown on the front cover, with Aida, Lennon and Bigelow on the back.