Princess Principal is set in a fictional analogue of Britain called Albion. During the early 20th century, the Kingdom of Albion monopolized a mysterious substance called “Cavorite” to construct a fle
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Clockwork Planet
At an unspecified point in time, Earth collapses. Despite almost inevitable humankind would perish, a genius engineer known only as “Y” manages to rebuild Earth entirely with gears and clockwork mecha