Sailor Chibi Moon and Sailor Saturn make it to Nehalennia's palace, where Mamoru is being held prisoner. But despite their best efforts, the two Guardians are unable to free him, and Sailor Chibi Moon fades from existence.
Sailor Moon runs off to save Mamoru from Nehalennia alone. The rest of the Sailor Guardians try to go after her, but one by one they fall victim to Nehalennia's traps.
Sailor Moon is left devastated after seeing Mamoru get abducted before her very eyes. To make matters worse, Nehalennia's action is starting to cause a time paradox, which threatens to erase Chibi-Usa's existence.
The city is being plagued by a strange illness that causes people to become obsessed with staring into the mirror for hours, even days. When Usagi goes to check up on Mamoru, she is shocked to...
Hotaru starts to age at an accelerated rate, growing from a baby to a young girl within days. As she slowly regains her memory and power as Sailor Saturn, she warns the other Outer Guardians of the coming danger that will soon befall Sailor Moon.
Usagi and her friends start their new lives as high school girls. Meanwhile, Nehalennia breaks out of her mirror prison to seek revenge against the Sailor Guardians.
The evil Queen plots to trap Earth in a energy field, powered by the dreams of children. After the arrival of a boy, children begin sleepwalking! Sailor Moon must save the children before the enemy places the entire world into an eternal sleep!
Chibi-Usa's school is having a sports day. However, one of its main events is jumping over the vaulting box, which Chibi-Usa is not very good at.
Minako and Makoto compete to win the heart of Honjo, a young principal who runs Honjo Preschool. But their rivalry starts to put a strain on their friendship.
Usagi and Chibi-Usa go to the dentist to get their cavities treated. Unbeknownst to the girls, the dental clinic is actually a trap set up by Palla-Palla to find Pegasus.
Ami falls in love with a melody she finds online. She works on making lyrics that match the melody and also goes to meet the composer, Toshiyuki Nishino. However, upon meeting him, Ami finds herself hesitant to show him the lyrics she made.
Usagi and her friends go to see a show at the Dead Moon Circus, which suddenly appears in Juban District, and are entertained by all the amazing tricks they see. But Momo starts acting peculiar and leaves the circus, causing Chibi-Usa to become worried.
Zirconia threatens the Amazon Trio that if they don't capture Pegasus by the next new moon, the magic making them human will wear off. A depressed Fish's Eye finds himself at Usagi's home, where he stumbles on the fact that Chibi-Usa is Pegasus's host.
Fish's Eye goes after his next target, Mamoru. But despite his best efforts, Mamoru seems to show no interest in being with anyone besides Usagi, causing Fish's Eye to start questioning his own existence.
Usagi and the girls are excited to attend the school festival—particularly Makoto, who hopes to meet the man of her dreams. Her wish seemingly comes true as she is asked to dance by a handsome man, who is actually Tiger's Eye in disguise.
Usagi and Chibi-Usa meet a strange woman named Rubina who follows them around at the fireworks festival. Unbeknownst to the two girls, Rubina is a princess visiting from the Kingdom of Amethyst who snuck out to experience life outside of her royal duties.
Usagi and Chibi-Usa see an ad for a free ballet lesson for beginners and immediately sign up. As they clumsily practice, Fish's Eye, who has also joined the lesson, draws the class's attention with his elegant dancing skills.
Usagi and her friends are enjoying their summer vacation by checking out boys at the beach. Shingo is also with them acting as their bodyguard—especially for Ami, whom he has a crush on.
Reports of Pegasus attacking the town cause Usagi and the other Sailor Guardians to have doubts about whether Pegasus can be trusted or not. But the girls soon learn that it was a trap laid by Fish's Eye to lure the real Pegasus out into the open.
An old woman named Mayako lives alone in a mansion. Mayako is distrustful of men, believing they are after her fortune. Diana and Chibi-Usa learn that Mayako is actually a kindhearted person who is just trying to protect the house full of her memories.