Parental Abandonment

In Japan it is a common custom for parents to leave their children alone at home and embark on a lifelong trip around the world once they hit the tender age of 14, sometimes even earlier. Of course this is done because the parents believe their children are independent enough to get their act together. But little do they know about the small secrets their offspring has, such as a childhood fiancé(e) or even a forbidden incestuous love between their (often not-blood-related) children. Of course aside from having a huge house, financial support is provided as well. Usually through the means of MAGICAL MONEY. In rare cases the parents actually die (shortly) before embarking on their world-trip, which is self-evidently used as an important plot device in the development of the child.