So, there's one example down in the Video Games section that got moved over here from Disease Bleach: the one from Last Scenario. Problem is, I'm not totally sure it fits better over here.
As far as I can tell, this trope generally refers to something spontaneous- it says so in the description, as well as in "Compare/Contrast" references on other pages. However, this particular example happened over the course of three years. So, which is more important- that there's a non-mundane reason for it, or the period over which it happens?