Retsuko is a 25-year-old red panda who is growing increasingly frustrated with her job in the accounting department of a trading company in Tokyo as she enters her fifth year working at the firm. All she wants to do is get her job done and make it through the day. But her frustrations often reach a boiling point -- whether it's because of pushy superiors or annoying co-workers -- and when they do she gets her emotions out the only way she knows how -- by going to a karaoke bar and venting through death metal music.