Human resources consultant Tsubaki Mako has been dubbed the "devil of human resources" for her iron-fisted ways. She struts her way into a well-established firm and tackles sexual harassment, power harassment, bitter rivalries between factions, and monstrous employees, all of which are issues that can strike any company, with her extreme methods. Mako is like a devil who solves problems with her bold tactics.

• Nanao
• Shori Sato
• Yoshino Kimura
• Eiichiro Funakoshi
• Toshiyuki Nishida
• Masato Wada
• Sei Shiraishi
• Moro Morooka