According to MSX FAN 1992-01 page 115 it's cancelled. Other ports were released.
Its graphics collection is in Disc Station #11-1. Disc Station #10 package and manual insist the playable demo of this title is included though in reality it is not.
The story was supposed to be 6 years after Derringer timeline. PC-8801 version playthrough: https://www.youtube.com/watch?v=bqAy8xTmOLo