Hitsujitani Chiharu joined a big advertising agency after she graduated from a university. She experienced a hard time at her job due to harassment. After 3 years, Hitsujitani Chiharu decided to quit working at the advertising agency. She begins to work for a temp agency that is run by her aunt. There, she meets Kurusu Arashi, who works as a career adviser at the temp agency. He walks with a cane due to discomfort from his left foot, but he has a great reputation as a career adviser and his nickname is The Devil of Changing Jobs. He often makes biting remarks to people worried about changing jobs. Working with Kurusu Arashi and dealing with people who are looking to change jobs, Hitsujitani Chiharu also grows as a person.

When Kanako accidentally applies to work at an assassination agency, the timid office worker discovers that she has a knack for bumping people off. Will she ever earn the respect of Sakurai, her prickly and kinda hot co-worker–and why is she still having silly workplace problems when she’s employed with hitmen?!

Ino Mamako is an English teacher at one of Japan's roughest schools, Ryuzan High School. After nine years of teaching, Ino decides to "reset" her life and meets with Ebisawa Yasuo, a charismatic "occupational change agent" who advises people on switching jobs. However, Ebisawa ends up hiring Ino as an occupational change agent herself. Together with her work partner Taguchi Ryota, Ino helps others switch gears in their livelihoods and transform the rest of their lives.