Densha Otoko: Ganbare Doku Otoko!
Other titles :
電車男 がんばれ毒男!, Densha Otoko: Gambare Doku Otoko, Gambare Doku Otoko, Train Man: Go, Poison Man!
Author(s) :Nakano Hitori
*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.