When Ami feels that her friendships with Usagi and Rei are not genuine, she reads a book on how to be a true friend. This causes friction between her and Usagi, and Ami gets into more trouble when she tries to defeat a Youma without calling for help.

Usagi is saved by a new girl in town from the bullies. When Usagi realizes the girl who saved her is at her school, she befriends her. The new girl, a tomboyish Makoto Kino, seems tough on the outside, but when she lets her guard down for a popular basketball player who turns out to be a Youma in disguise, the vulnerable Makoto must awaken as Sailor Jupiter to defeat him.

Usagi and Mamoru help Motoki find his pet turtle, leading them to a kind hermit with no memories. Meanwhile, the evil Queen Beryl intends to awaken her fourth general, Kunzite.

Usagi faints as Kunzite's spell to transform her into a Youma comes back into affect. While Makoto and Rei run off to find Kunzite, Ami does her best to help Usagi fight back.

Usagi takes a sick day following the situation with Mamoru, but Ami is also noticeably missing from school. Makoto finds her curled up in bed and cares for her before Ami makes an odd request to go to an amusement park where she passes out! Ami is rushed to the hospital where she later escapes and makes her way to Kunzite for a startling discovery.

After the team's introduction to Dark Mercury, Usagi finds that Ami has turned their class against her. Later, Mars and Jupiter battle a Youma while Ami challenges Sailor Moon to a fight.

Usagi and Mamoru had previously lived their lives deeply in love, as the Princess of the Moon and Prince of the Earth.

Although in the present they have once again managed to meet due to their strong attraction, the love between the two of them cannot be allowed.

Looking to find his true self, Mamoru has journeyed to London. Having given up on Mamoru, Usagi now decides to focus all her strength on regaining the dark-hearted Ami.

Meanwhile, a single senshi appears in front of Ami. (Sailor Mercury.) Stating, ""I will surely restore you,"" who could this senshi be? And a mysterious girl also happens to appear in front of Usagi, Rei, and Makoto at the same time.

The spell cast upon Ami started to break by the light of the ginzuishou. But Ami's heart was still troubled, and as though casting off doubts, she hit Sailor Moon with her sword.

When she came to, Ami found herself and Usagi in the middle of a forest. No longer cursed, Ami can still remember everything that had happened between her and Usagi through to now.

Yet it is too late. Carrying the motionless Usagi, Ami bursts into tears

Finally, Usagi and Mamoru's affections have united. Although their love has been said to be cursed since their previous existence, seeing Usagi's delighted appearance, her friends cannot separate them, despite their personal unease. As opposed to Usagi, who's reached the summit of happiness, Ami has been always lonely due to being emotionally isolated from her mother, and Rei, with her father being a politician, has always been resentful of him. Yet the situation has presented itself in such a way that both will have to face off against their parents.

Since Ami was a child she has always suppressed herself and followed what her mother requested of her to make her mother happy. But even though her mother said it would be best to change schools, Ami is unable to suppress herself, as in the past, this one time. Meanwhile Rei remains unable to forgive her father the politician for not coming to the hospital when her mother was dying. What actions will these two, who hold such complex feelings toward their parents, take...?

Facing Sailor Moon, Mamoru- as his previous-existence alter-ego Endymion- drew his sword! With the intention of not repeating the tragedy of their previous life, Endymion declared war upon Usagi. But Usagi's feelings will not change. She will gallantly continue to believe in Mamoru.

Also, in a completely unexpected twist, Aino Minako's office president requests Usagi's mother to become a television reporter!

(I prey they change this and get a nicer one)

Having been taught by Mamoru that the only way to protect the planet is to do it oneself, Usagi seeks to harness the power of the legendary Silver Crystal.

Meanwhile Minako decides that, given how little remaining life she has left, she will quit singing and focus only on the completion of her previous existence's mission. Just as she is about to does this, she is informed by the office president that Minako's work will be taken over by a new face. Having suddenly snapped away her work, the identity of this new idol who appears before a surprised Minako is...

After Sailor Moon has no choice but to kill Endymion, the Princess uses her power to destroy the world again, and the other Senshi are too late to stop it. Realizing that the world's demise was, in fact, the result of her selfishness, Serenity uses again the power of her love for Endymion to bring the world back to its original state, giving Usagi and Mamoru a second chance in life.