Akihabara is a Tokyo district full of mangas, anime, electronics, video games, figurines, etc. It is a place that gathers fanatics of such themes, people who are commonly referred to as otaku.
Page, Box, Akira, Taiko, Daruma, and Izumu are six otaku each with his/her own troubles and sought relief through a website called "Yui's Lifeguard."
When site owner Yui died of a mysterious death, the six - each is an expert in their own field - gathered to form "[email protected]", a "trouble shooter" group that vows to protect Akihabara and solve the problems of its inhabitants. --asianmediawiki