The last member of the Witches 5, Cyprine, manages to steal a large number of pure hearts from the students of Mugen Academy. Meanwhile, Kaolinite takes notice of Chibi-Usa's power and kidnaps her!
A new variety of flower called Tellun is being sold at a flower shop in the Juban District.
Usagi and her friends sneak into Mugen Academy in search of Hotaru, who has gone missing.
Seeing the happy couples around her, Minako starts questioning her life as a Sailor Guardian and the sacrifices she has to make.
Kaolinite sets her eyes on Ami, believing that the famous girl genius would possess a pure heart full of confidence.
Kaolinite has a new target: Makoto. When Haruka and Michiru find out, they decide to use Makoto as bait in order to obtain her talisman.
Motoki's little sister Unazuki is a pure-hearted girl who dreams of sharing her first kiss with the person she truly loves.
Usagi asks her friends to help her become a better person worthy of being Mamoru's bride.
Usagi and Minako sneak off to the arcade to take a break from their life of studying. While enjoying the latest racing game, the girls are approached by a handsome student named Haruka Tenoh, who wishes to join them for a friendly match.
The Dark Gate opens, and Dark Energy spreads everywhere. To stop this, the Sailor Guardians must defeat Black Lady.
Saphir learns of Wiseman's true intentions and tries to warn his brother, only to be attacked by Wiseman himself. Barely managing to escape, Saphir is surprised when he is saved by Petz and her sisters.
Chibi-Usa finally decides to return to the future to save her mother. With support from the Sailor Guardians and Tuxedo Mask, she overcomes her fears and opens the Door of Space and Time.
After being out sick a couple of days, Chibi-Usa returns to school eager to see her friends. But to her surprise, her friends and teachers begin attacking her.
Artemis is out to prove he is capable after being teased by Luna. While on patrol, he encounters a suspicious-looking man who is gathering stray animals.
Usagi is still depressed over Mamoru calling off their relationship. Ami and Mako try to cheer her up by taking Usagi to a promise ring workshop.
The Black Moon clan sends down its next operative, Esmeraude, to open the Dark Gate in 20th century Tokyo.
Chibi-Usa falls into a coma after coming down with a mysterious fever. Usagi and the others are at a loss for what to do, when a Sailor Guardian calling herself Sailor Pluto suddenly appears before them.
Ami enters the World Chess Tournament, which is being held at the newly constructed Chess Tower. But Bertheir is also there, forcing Ami to transform and reveal her identity as a Sailor Guardian to the enemy.
Wiseman predicts that Chibi-Usa will appear at Hikawa Shrine. Learning of this, Rubeus orders Koan to go down there and eliminate their target.
Mamoru has a dream in which a mysterious voice warns him that being with Usagi will bring her great misfortune. Meanwhile, Sailor Moon is put into a deep coma after being attacked by a Droid.