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Naoko Tanaka is a 26-year-old office lady (OL). Her job is typical, but her workplace has fierce fights among different cliques. Other OLs are absorbed in the daily clique fighting. One day, due to an OL at the company, Naoko Tanaka's company is targeted by OL from all over Japan.

On May 5, 2002, two show participants injured their cervical vertebrae during the filming of an episode entitled "Chikarajima" ("Power Island"), an obstacle course with a temple like setting stationed outside. The accidents occurred during the "rock attack" and "rock valley" obstacle portions