Princess Maker.eu

Long, long time ago, the Japanese (sic!), specifically GAINAX workers, invented a life simulator game. In ‘The Sims’ era the idea may seem a bit conventional, however, the GAINAX game is a child raising game! The player gets a role of a foster father, who (as a result of various circumstances) is to bring up a little girl. The child is 10 years old and requires everything typical for a ten year old.

So far, there are 5 main games of "PM" series and many mini-games based on "rising child" idea.