Beginning in 1991, the original "Sailor Moon" manga tells the story of a middle-school student named Usagi, an awkward, talkative, and love-obsessed girl. One day, she encounters a black cat that talks, introducing herself as Luna and giving Usagi a magical broach. This item allows her to transform into Sailor Moon, the leader of the Sailor Guardians, or Sailor Senshi, a group of warriors destined to protect the world from the dark evil attempting to take over. Usagi and Luna gather up the fellow Sailor Guardians, which include Sailor Mars, a.k.a. Rei, Sailor Mercury, a.k.a. Ami, Sailor Venus, a.k.a. Minako, and Sailor Jupiter, a.k.a. Makato. The Outer Senshi, including Sailor Uranus/Haruka, Sailor Neptune/Michiru, and Sailor Pluto/Setsuna, are introduced later on. Each Sailor Guardian has special abilities tied to the planet they represent and the corresponding Roman gods.
The Sailor Senshi are told that they must find and protect Princess Serenity. Over time, the group begins to realize that they are actually the reincarnations of the original Sailor Guardians who were destroyed long ago along with the Moon Kingdom, and Usagi is the reincarnation of the princess they are looking for. They also have a constant ally in Tuxedo Mask, a vigilante of sorts who always seems to appear right when they need him. His real name is Mamoru, a high-schooler from the area, who also happens to be the reincarnation of Princess Serenity's true love, Prince Endymion of the Earth Kingdom. Oh, and there's also Sailor Chibi Moon/Chibiusa, who is the reincarnated daughter of Usagi and Mamoru. While it all seems quite complicated at first glance, trust us, it's not hard to understand. Basically, the team of Sailor Guardians use their powers to fight evil queens and other enemies, working together to protect all that is good in the world.