"The Moon" is a giant robot created by the millionaire Baron, spending 2.5 trillion yen (at that time). Baron stated that the god is dead and created Moon as a replacement, to serve as a new power to bring justice in world of evil. He entrusts the operation to boys with a pure heart, those who can find true justice, as he believes he isn't pure of heart.

"The Moon" is a giant robot created by the millionaire Baron, spending 2.5 trillion yen (at that time). Baron stated that the god is dead and created Moon as a replacement, to serve as a new power to bring justice in world of evil. He entrusts the operation to boys with a pure heart, those who can find true justice, as he believes he isn't pure of heart.