Kip. 10: The Cursed Bus: Enter Mars, the Guardian of Fire

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Queen Beryl warns Jadeite to stop making mistakes. Under this order, Jadeite disguises herself as a servant in the Hikawa Shrine to use her evil powers and manipulate the girls into using a bus that takes them to another dimension. Loaded buses are disappearing near Hikawa Shrine, and most of Usagi's peers suspect that Rei Hino, a mysterious shrine miko with strange psychic abilities, has something to do with it. The police also suspect the owners of the Hikawa Shrine because the people who visit the shrine are the same ones who disappear on the bus. Jadeite sends Rei to another dimension after discovering that he is the real culprit of the missing girls. Luna wonders if she might be the moon princess, but it is later revealed that she is another Guardian, Sailor Mars. (Source: Wikipedia)