Usagi Tsukino is a 14-year-old schoolgirl who is very cheerful, but clumsy and is always finding herself into unwanted trouble. One day, Usagi meets a talking black cat named Luna, who reveals that dark forces are threatening the lives of the innocent and that Usagi has the power to stop them. Using a magical brooch, Usagi is transformed into Sailor Moon, the chosen guardian who fights for love and justice.

The boys at Usagi's school are misbehaving, and it may have something to do with the mysterious new fortune teller in town.

All the girls in town are tuning in to the late-night radio program called "Midnight Zero" that reads out love letters sent in by the listeners. Meanwhile, a strange sleeping sickness is plaguing the town, causing people to fall into a coma-like state, including Ms. Haruna and Naru.

Usagi is shocked to find out that she's gained weight from too much eating. Determined to get back into shape and fast, she and her friends join a gym that advertises instant results for its members.

Usagi tries to convince her parents to let her adopt Luna, but her brother Shingo has a great disliking of Luna and slight ailurophobia. Later, a mysterious new pet store opens in town which is selling strange new creatures that put Shingo and everyone else who gets one into a hypnotic trance.

Usagi befriends Yusuke Amade, a jazz musician who is being followed by a Youma, and helps him confess to the woman he loves.

Usagi and Naru both dream of becoming stars like Mikan Shiritori, a graduate from their school. When the girls hear that Mikan is holding a talent contest, they see their chance to achieve stardom.

The Sailor Guardians go to the Dream Land amusement park, where visitors have reportedly gone missing. The team splits into two groups: Usagi and Rei and Ami and Luna. But, much to Rei's frustration, Usagi is more focused on playing than finding the missing people.

Usagi and Ami go to the city to enjoy some shopping, where they find a clock store selling a clock that resembles Luna. Later that day, Usagi is happy to learn that her mother bought the exact same clock as a gift. But that night, the clocks from the store emit a strange light, making Usagi and the rest of Tokyo very impatient.

Several people who take the bus near the Hikawa Shrine have gone missing. Usagi, Ami, and Luna decide to investigate by visiting the shrine. There, they meet Rei Hino, a shrine maiden with strong spiritual powers.

Queen Beryl is increasingly furious with Jadeite for his repeated failures; he starts up a theme park, but the general public notices the large number of disappearances. Usagi and Rei, who is now Sailor Mars, begin their combative friendship.

One of Queen Beryl's youma offers to help Jadeite with his wicked plans. Rei wins tickets on a luxury cruise ship and, since she has no boyfriend, asks Ami to accompany her. A jealous Usagi sneaks aboard after them.

Usagi continues to be attracted to both Motoki and Tuxedo Mask. Threatened with Eternal Sleep if should he fail again, Jadeite confronts the Sailor Guardians at an airport.

Nephrite is appointed as Jadeite's successor and begins selecting individual targets for energy, the first one being Naru's friend Rui.

Rei falls for Mamoru and persuades him to go on a date with her, whilst Nephrite targets the caretaker of a local park.

Usagi decides to enter a homemade wedding dress contest, while her home economics teacher is targeted by Nephrite.

Nephrite targets a gifted young photographer, while Usagi tries to achieve her dream of becoming a model.

Shingo upsets his friend Mika, an award-winning doll maker whose skills make her the next target for Nephrite's energy gathering.

Nephrite takes advantage of Sailor Moon's attraction to Tuxedo Mask by sending love letters to Usagi and her classmates. Naru falls in love with him in his civilian disguise, allowing him to drain a large amount of her energy.

Usagi, Ami, Rei, and Luna take a vacation in order to train, but the hotel they have booked is haunted by a strange phenomenon.

Nephrite uses his most powerful Youma to target an animator working for the new Sailor V movie.

Both Luna and Queen Beryl wonder if a visiting princess could be the one the Sailor Senshi has been looking for. Mamoru dreams he is Tuxedo Mask and a girl is asking him for the Silver Crystal. At the ball, Usagi gets her first kiss.

Zoisite decides to use Nephrite's recently discovered romantic feelings for Naru to manipulate him into handing over the Black Crystal to him.

Still in love with Nephrite, Naru becomes an unwilling tool in the power struggle between Nephrite and Zoisite.

Queen Beryl partially awakens the evil entity Metalia and sends Zoisite and Kunzite to find the Seven Great Youma and their Rainbow Crystals. Meanwhile, the tomboyish Makoto Kino transfers into Usagi's school and falls for a crane-game whiz at the arcade.