Ou Dorobou Jing is a Game Boy Color game released in Japan. The game's title translates roughly to "Thief King Jing." It has two versions: "Angel Version" and "Devil Version." The gameplay likely involves stealth, puzzle-solving, and possibly some action elements, given its "thief" theme.  Further research is needed to determine the differences between the Angel and Devil versions and to discover the developers.

Ou Dorobou Jing - Angel Version (Japan)

Other Life - Azure Dreams GB (Japan)