Mitazono Kaoru is a superb housekeeper who belongs to a housekeeping agency. Although he is a male in an industry dominated by females, he handles housework such as cleaning, laundry, cooking and babysitting perfectly. However, it is not just the dirt in the house that Mitazono cleans. He completely cleans off "deep-rooted dirt" in the households that he is assigned to each time. These are the households that society calls the "successful" where the people are proud, condescending and insufferable. Mitazono learns the family secrets and slowly lays traps to expose all of the secrets and reveal the family for who they really are. Then he gives the last push that breaks up relationships. However, this becomes the catalyst for the family to start again and solve the problems they have.