Douke Daisuke

Dororo Bon (どろろ梵) is a spin-off series written and illustrated by Daisuke Dōke, conceived as a continuation and reimagining of the original manga's ending. 500 years after first series events Hyakkimaru is reincarnated as a woman, still with his past curse hunting him. She continues her journey to take her body parts back from the demons, including Dororo who had become a demon herself.

manga is based on a true story and the true story was done in 2ch It's about an Otaku guy who fell in love with this beautiful lady and tries his best to get that girl with a lot of help from 2channelers (people who goes/posts on 2ch). This story has become very famous in Japan and I believe they now have novels, several series of Manga (both Shoujo and Shounen), movie, drama, play, etc, etc.