We already know you can't save money even if your life depends on it, but how will you do when the lives of a virtual family are at stake? Said family lives inside Jinsei Ginko (translates into "Life Bank") and starts off in relatively modest conditions. As you add money to the bank, their lives get better, eventually progressing through marriage and (hopefully) to a life of opulence and luxury. Since the product page isn't in English we can't tell what happens when you finally decide to take out your (i.e. their) life's savings to buy a Wii. If the analogy holds, we're assuming divorce and destitution.

Jinsei Ginko via Ping Mag