In the era following a certain natural disaster, Jyougasaki Hichiki, an escapee from The Rebirth Training Institution for Boys, makes his living as a professional thief.
A chance encounter with the mysterious and unfathomable "Bo-chan" -- the enigmatic being who dwells within the Peppermint Highway Mansion -- compels the curious burglar to infiltrate the run-down (but charming) household as a butler... But what does Bo-chan have in store for the eccentric Jyougasaki?