Official website: http://www1.u-netsurf.ne.jp/~nori_koj/mtomo/mtomo_index.html
Sony Programming Contest Associate HitBit Award Winner
1990 the release year on the official website is likely a typo since the Sony Programming Contest happened in 1989.
Was later remade into Dragon Rouge while the story continued to Basaro Attacker.
Whether this game ever became available to the public and whether Part 1 prequel existed are unknown.