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.
Minako and Makoto clash over their opposing views on love. Wanting to break the tension, Usagi takes the girls to check out a new accessory shop, unaware that Petz and Calaveras run the place.
Rei's grandfather is upset over the fact that Hikawa Shrine has had fewer female visitors lately. He then decides to retire as head priest to start a new business, which would allow him to be around young women, much to Rei's annoyance.
Ami is offered a chance to study abroad in Germany, which would bring her one step closer to her dream of becoming a doctor. Knowing how important this is to her, Usagi and the others urge Ami to accept the offer.
Usagi wakes up one morning to find that Chibi-Usa has gone missing. Meeting up with Mamoru, the two search the neighborhood for Chibi-Usa, eventually finding her sitting alone at the park.
While visiting Seijuro and Natsumi's apartment, Usagi and Mamoru come under attack by the Makai Tree.
Ail and An learn that the Makai Tree is beginning to die from lack of energy. Meanwhile, Usagi and her friends visit Seijuro and Natsumi's apartment after hearing that Natsumi is not feeling well.
Usagi and Natsumi both get detention after angering Ms. Haruna during class. The two start working on their assignment when a Cardian suddenly shows up.
Usagi and the girls get into an argument over who gets to play Snow White in the upcoming play with Mamoru. After drawing straws, Natsumi gets the part, much to Usagi's frustration.
Ami and Makoto are trying to figure out who exactly the Moonlight Knight is. Suspecting that Seijuro and the Moonlight Knight may be the same person, Makoto volunteers to investigate by getting closer to Seijuro.
A school festival is going to be held at T.A. Girls' Academy, which Rei attends. When Usagi and Ami go to check up on her, they find Rei busy overseeing the setup and events.
Usagi goes to a virtual reality arcade that has just opened up in the Juban District, where she unexpectedly runs into Mamoru, as well as Seijuro and Natsumi.
Usagi, Mako, and Ami see a boy being attacked by one of Ail and An's Cardian monsters. To Mako's surprise, the boy turns out to be her childhood friend Shinozaki.
Two months have passed since the Sailor Guardians defeated the Dark Kingdom. Having lost all memory of being Sailor Moon, Usagi now lives her life as an ordinary girl.
Sailor Moon confronts Queen Beryl's Endymion. She attempts to free Endymion from Queen Beryl's control, but his brainwashing cannot be undone. With the fate of the world hanging in the balance, Sailor Moon is forced to fight the man she loves.
When the exploits of a Sailor Moon imposter become quite the sensation, the real Sailor Guardians step in to investigate. They soon learn the whole thing is a trap set by the Dark Kingdom to lure out Tuxedo Mask and seize the Rainbow Crystals.
Umino seems to have fallen in love with Naru. Unfortunately, Naru only considers Umino a friend, so Usagi decides to play Cupid by getting free tickets to the amusement park and urges them to go on a date together.
Usagi and friends meet a girl who they believe holds the final Rainbow Crystal. Zoisite also pursues her. But when neither Usagi's Moon Stick nor Zoisite's Dark Crystal reacts to the girl, they realize it's her pet cat that possesses the Rainbow Crystal!
Grandpa Hino has become emotionally unstable, causing Rei to worry. The new apprentice Yuichiro tries to cheer her up by blaming Grandpa's behavior on the weather. Realizing that Yuichiro likes Rei, Usagi tries to help their relationship along.