I think it's some sort of short story inside this manga: http://www.mangago.me/read-manga/gochisousama/ :) (sorry if my English is not that good T.T)
THANK YOU MY SAVIOR!!!! I never would have thought it was here! I knew I was familiar with the author, but I couldn't remember which! I must have passed over this ten times in my search!!!! THANK YOU!!!!!
Hahaha you're welcome :)
I think it's akihabara fall in love
Please, someone help me! I've just wasted an entire weekend searching for a manga I read a while back. Basically, the plot is that a guy falls in love with another guy when he bumps into him and knocks his glasses off. He tracks him down and finds that he's an otaku. The otaku writes fanfiction for (at least I think it was) Vampire Knight so the guy decides to dress up like the main character. At a comic convention he brings along another costume for the otaku to dress up in. If anyone understands what I'm talking about, please tell me the title or leave the link.