The story takes place before the first game and tells the story of the father and mother of the series' protagonist, Yu.
This sequel is positioned as episode 0, revealing the roots of cosmic fantasy.
Not only Yu's father and mother appear, but Yu himself also appears and they defeat the enemy together.
How do father, mother and son appear, how do they meet, and how do they part ways...
The third game in the series, the midpoint of the five titles, is a commemorative title that can be said to be the origin of cosmimic fantasy.

■ Improved graphics and visual scenes with plenty of voice acting
The visual scenes, which became the origin of game movies, were a big topic at the time for their beautiful graphics.
With the release of SUPER CD-ROM² and the increased capacity, the improved visual scenes further liven up dramatic scenes such as human drama.

More details on the official game page of COSMIC FANTASY3 ...