Beautiful girls are in danger.Terror haunts Sunny Beach, the fabulous resort destination of college students Miki and Mai, who get lost while searching for their hotel. They are rescued by a handsome man who offers them shelter, but the blood on his hands warns them of danger. The girls should be afraid of the water, too, for a ravenous great white shark is stalking the area and has savored several bikini-clad swimmers. Can Miki and Mai escape the serial killer and the shark?
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 otakus, each with his/her own troubles who sought relief through a website called "Yui's Lifeguard". When the site owner, Yui, died of a mysterious death, the six, who are each expert in their own fields, gathered to form "Akihabara@DEEP", a "troubleshooter" group that vows to protect Akihabara and solve the problems of its inhabitants.