Law had just changed in your nation.
While mamonos were still unable to come in to your nation legally, thuogh some did live in the forrests, demon realm products were now legalized.
Your father happened to be rather successfull businessman, especially on the inport/export sector, and many of his clients were allready sending inuirys on what, and when he could start delivering these demon realm products, and at what price.
And currently none of you had any idea of what there even would be for sale in Demonrealms.
How ever this was a business opportunity that simply couldn't be passed. And as any of the mamonos couldnt come and show the produce.
He would have to find someone to go in to the nearby demonrealm, and find out what there would be for sale, with large enough quantitys that it would be beneficial to import.
And as you allready had pretty good understanding of how the buiness works, and you are the man behind few of the more beneficial deals. Not to mention you are the least likely to sell information to competeing companys.
Yep, It was kinda obvious. You would be heading in to the demonrealm to find and sign the best possible deals.
To you it was just a regular business trip.
Until you passed the border. The sun became hazy, and purplish, and all kinds of monsters roamed around the train.
It was first train on these tracks since the neighbouring kingdom turned to demonrealm.
According to your clock, it's just past noon, but it's allmost as dark as midnight, as the train pulls to the station.
WWYD