Princess Principal DVD 1-12 - (Japanese Ver) Anime
In the late 19th century, the kingdom of Albion is divided. Because of its
access to a gravity-defying mineral, Albion's empire has grown to rival that
of ancient Rome, but this has caused dissent within the country, and now Albion
is divided by the Wall, with the Kingdom on one side and the Commonwealth on
the other. At the Queen's Mayfair Academy, five girls, including one of the
royal princesses, work as spies between the divided nation, aiding defectors
to cross over to the Commonwealth. Their most recent task is to ferry a scientist
named Eric over, but he refuses to go without his little sister Amy, an aspiring
dancer who's been hospitalized. But Eric is not being honest about his intentions,
forcing the girls' mission to change in ways unexpected and cruel. | 
