A moonlit night above Jade city, a being fell from the dark wintery sky to the brightly lit metropolis below. Whoever Lepora was before the fall drifted away into that endless black sky.

Now a vigilante known as the Moon Rabbit, Lepora guards the city against all manner of threats. However, Lepora's inhuman abilities only last as long as the night, for from the break of dawn to the setting sun, Lepora remains weak and powerless. A secret she must keep for fear of those that would attempt to use this Achilles heel against her.