Boku, Otary-man (otaku + salaryman) is a autobiographical manga of the author Yoshitani, who is also working as a system engineer. It's about a slice of life of an office worker, who is a little bit otaku.
Fujyoko is a 24 year old office worker. She admires her fashionable senpai Takayo, but one day she meets her at a doujinshi event.