The drama is based on a blog written by Bakarhythm between 2006 and 2009 where he posed as a OL nicknamed Masuno Kakū, who supposedly worked in a bank and wrote stories about the daily feelings of a OL from her perspective and the people around her.

• Bakarhythm
• Kaho
• Asami Usuda
• Ryo Sato
• Maho Yamada