Sorata Muon, a teacher, maintains on his family's centuries-old heritage of being the master thief Mouse, capable of stealing anything after properly warning authorities of his intentions so that they may be there yet fail to stop him. He is aided by three nubile female assistants who also wear the teaching cover and who, in typical Satoru Akahori fashion, prefer tight/skimpy/bondage outfits over their ample curves as they constantly pursue Sorata much more than he does, though the girls do receive some attention from their master. Not only are the girls and the local law enforcement agencies pursuing Mouse, but there is also a hidden art protection group enlisting the services of a former ally of Sorata's after his cute little hide, all in 15 minute episodes.