When Motoki is tasked with repairing Tuxedo Mask's jacket, Usagi mistakenly thinks he is Tuxedo Mask, and invites him, Mamoru and Takai for a date with her, Rei and Makoto in an amusement park.
Tuxedo Mask announces on the media that he wants the Silver Crystal, causing a businessman to contact Rei to protect his jewel. Ami goes to his mansion disguised as Rei, while Usagi tries to sneak inside dressed up as Tuxedo Mask.
Usagi has an argument with her mother, leaves home and stays over at Rei's shrine. Zoisite sends a Youma whose singing assails everyone thinking of being a princess, including Erika, at the shrine drawing a picture of Princess Kaguya.
After an injured Minako is sent to the hospital, Usagi and Makoto sneak in to try to get her autograph. Meanwhile, Zoisite controls brainwashed Sailor Mars and Mercury to attack them.
Minako leaves the hospital, and Usagi spends time roaming the city with her, even diverting fans from her. After a Youma possessed her manager, Minako reveals her identity as Sailor Venus to other Sailor Senshi.
While searching for Motoki's turtle, Usagi and Mamoru stumble upon Shin, a guy who cannot remember anything about his life and is living in a mansion. Shin turns out to be Kunzite.
A wounded Usagi falls into a coma, and is abducted by Kunzite who wants to transform her into a youma in a cave. Sailor Mercury goes to the cave to save Usagi.
Minako deliberately allows a burglar to steal her jewels so that this will distract the Dark Knigdom who will be after the said jewels. However, Usagi and Mamoru go after the burglars, too, to retrieve the jewels.
An antlion-like Youma creates a sand-pit under Naru and captures her, while Ami is plagued by guilt for not being able to save her. As Sailor Mercury, she thus gives it her best to rescue Naru and mend fences with her.
Usagi is sad upon finding out Mamoru is in a relationship with another girl, Hina. Meanwhile, a youma attacks a Christian convent, and Sailor Mars and Venus are there to try to stop it.
Mamoru is torn between Usagi and Hina. When Kunzite strikes Tuxedo Mask with a sword, Sailor Moon wants to protect him and transforms into Princess Serenity.
Usagi and the senshi remember their past in the Moon Kingdom. In the meantime, Mamoru flies off on a plane to Britain to study, while Hina stays behind.
When some of Usagi's classmates falsely blames Usagi for what happened to Mio, Minako suspects she has brainwashed them into blaming her friend for something she didn't do. Once again, she warns Usagi to stay away from Mio as she's a very evil person. Can she listen to her friend's warning for once and stay clear from Mio?
Zoisite wants to remember his past so he teleports Mamoru from London to Tokyo. Hearing that Mamoru disappeared, Usagi is worried. Mio persuades Usagi to be an assistant to star Yuuta, who plans a trip to London and can take her.
Ami has problems with her mother, who wants her to change her school. At the same time, Rei has an argument with her distant father, blaming him for not being there when her mother died.
Rei runs away from home to stay at the Game Crown base. However, she makes up with her father, while Ami gets the courage to tell her mother that she will not go a different school.
Mio fakes she fainted on the street so that Mamoru can bring her to the hospital. Minako accepts Zoisite's offer to play a music box which will erase Usagi's memory of Mamoru, as to try to save the world from potential doom.
Mamoru and Usagi are dating all day. On a meadow, Queen Beryl appears and orders Mamoru to return to her, or else she will force the four Shintennou Generals to kill themselves with their own swords.
Usagi mysteriously disappears, so Ami has to play Usagi and change her hairdo, hiding in bed at Usagi's home. Mio turns out to be a henchman working for Queen Beryl, who abducted Mamoru.
Usagi talks with Princess Sailor Moon about how she was the one who caused the end of the world due her grief as Princess Serenity when Endymion was killed. Queen Beryl is persuading Mamoru that Princess Sailor Moon is a threat.
Ikuko undergoes a military training by Minako's manager, who wants to make a TV reporter out of her. A sniper youma attacks Usagi from the rooftop. Endymion threatens Sailor Moon because the Silver Crystal might destroy the world.
Minako and Rei form two teams to play in a TV show, together with Makoto, Ami, Usagi and Sailor Luna. Minako decides to quit her singing career since she has a terminal illness, but Rei wants to persuade her to undergo a surgery.
Makoto, Ami, Rei and Usagi volunteer at a kindergarten. Usagi tries to match Motoki with Makoto, who is wearing a turtle costume. When youmas attack, Usagi transforms into Sailor Moon in front of Naru.
Jadeite inserts a black crystal into Mamoru which will weaken him if he gets close to Usagi. Meanwhile, Usagi is training her will power by lying for three hours in a bath tub as to control her destructive side as Princess Sailor Moon.
Usagi's mother wonders about Mamoru's absence. When a youma attacks, Sailor Moon loses control and stabs it with a sword, and Mamoru has to calm her down. Mamoru spends a walk at the beach with Usagi despite his threat.
Rei and Minako argue over their duty and responsibility. Zoisite sends a youma to attack Sailor Moon, but changes his mind and protects her, so the youma kills Zoisite.
A weak Minako is unable to transform into Sailor Venus, and thus a youma was able to badly wound Sailor Jupiter and Luna. Minako does transform eventually, and agrees to undergo a surgery.
Endymion flies into Metalia to absorb its energy and stop it. Minako dies during surgery. Upon hearing that tragic news, Sailor Mars channels all her anger into destroying a youma.
Mamoru absorbed Metaria inside his body. He challenges Zoisite to a duel, hoping that Metaria will die with him. However, Metaria takes over his body. Sailor Moon is faced with a dilemma; kill Mamoru or allow for the end of the world.
Upon finding out that she did kill Mamoru/Prince Endymion, Usagi loses it and transform into Princess Sailor Moon to destroy the Earth. Can Ami, Rei and Makoto try to stop her before she succeeds?
