I've always been infatuated with the absurd, and the notion of students being required to take off clothes at school for some redeeming social value ranks near the top of my list. After reading a particularly good story (where a female student was notified about her participation in an NIS program and her mother prepares her by having her father fuck her), I decided to try my hand at one. As is sometimes the case, the story grew well beyond my original intentions. I now have about eight chapters complete, with three more in planning stages.
So, to the essential question: Must an NIS story be primarily about student sex at school? The author of that excellent story that started me on this series said "No". I tend to agree (obviously) although some reader feedback has me thinking that I owe my readers at least one sex-filled chapter within the school walls.