Although it is somewhat obscure and was overlooked due to its late release, it is notable for its long development and as one of the largest RPGs created for the Famicom.

[2] While not in battle, the player can explore towns in which one can purchase items and equipment, engage in storyline events, or casually interact with numerous non-playable characters.

The game's story opens in the town of Astholm, which is spiritually protected by a sapphire wielded by the priestess Firis.

During the town's Sapphire Festival, Firis is kidnapped by the henchman of Ezelkiel, a man bent on collecting the priestesses to revive an ancient evil.

[3] Manga artist Yuzo Takada, best known for 3×3 Eyes series, designed both the characters and monsters, while anime composer Kōhei Tanaka scored the game.

[6] A 57-page illustration book titled The World of Just Breed was published by Futabasha on June 20, 1993, featuring all of the game's artwork by Yuzo Takada.