Follows a girl in her pursuit of love, bondage, rope... Trying to find the one and act out her fantasies in real life.
Partially based on real life, with some parts made up to make it a good read.
Based on real experiences, some slightly modified to fit better into a book.
Proof: Nanayamichan.com
Webpage itself might not be NSFW, but the more you dig into it, the more NSFW it gets.