Having met an unusual stuffed cat named Luna, Tsukino Usagi has taken on the mantle of Sailor Moon and begun her fight against the dark organization. However, Yet since Usagi is so unreliable, Luna has decided she has no choice but to find other senshi to assist her. Even though the earth is drawing near a crisis of unmatched proportion, due to the activities of Sailor Moon's evil enemies, the hot topic around town are the subject tests being performed at Usagi's school. Enter Mizuno Ami (who also happens to be in the same class as Usagi.) While walking home one day, Usagi meets Ami by pure coincidence. But... why is Luna in her hands? How did Ami end up with Luna? And strangest of all... Sailor Mercury.