Equipment Destruction Work: the Six Detectives of Fan Village

In order to relieve the symptoms of depression, Mitsue Kazama went to Homura Roku's office. Homura showed off his unique scientific detective methods, and then entrusted Mitsuae to go to a mansion and, as a maid, engage in the work of destroying appliances, breaking items in the mansion and causing chaos. What is the purpose of Fancun?