500 years ago, the Demon King was defeated...

However, the three heroes of legend disappeared thereafter, never to be seen again, leaving the world to fend for itself as an age of rapid economic growth rapidly approached. With the establishment of an alliance between the world's major nations, an unprecedented amount of people began taking up trading as an occupation, leading to the creation of the Merchant's Guild, an exclusive organisation staffed by the world's most powerful traders, who would come to be known as 'Trader Kings'.

This is the story of a peaceful young man's journey through this world.