In the fictional Tokyo suburb of Mahoro, Keisuke Tada (Eita) works as a “benriya” – a general problem solver for hire.
One day in January, former classmate Haruhiko Gyoten (Ryuhei Matsuda) appears unannounced. Back in their schooldays Haruhiko was a quiet person who rarely talked. Now, Haruhiko is talkative. Both men are over 30 years old and divorced. Without giving an explanation, Haruhiko suddenly asks to spend the night at Keisuke’s home. Keisuke turns down Haruhiko, but Haruhiko is persistant and finally Keisuke allows him to sleep over for one night. What Keisuke is unaware of is that Haruhiko plans to stay for more than one night. Eventually, Keisuke accepts Haruhiko as his assistant and they become involved in various cases involving an assortment of people from different walks of life.
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 who are each experts in their own fields gathered to form “[email protected]/* */”, a “trouble shooter” group that vows to protect Akihabara and solve the problems of its inhabitants.