Star☆Twinkle Precure - Season 1

Catching up to the girls as they arrive back on Earth, Topper of the Space Alliance requests that the Precure join them, but the girls turn him down due to their personal obligations. Noticing Hikaru's Twinkle Book, Topper takes her to his ship to talk about his failings and ask her to join the alliance to help him bring light back to the galaxy. Just then, Darknest's second-in-command, Garuouga, appears to challenge Hikaru on the Moon using a bracelet given to him by Darknest. As Garuouga obtains the last Star Color Princess Pen, the other Cures come to Hikaru's aid. Although their attacks seemingly have no effect against Garuouga, Hikaru manages to retrieve the Pisces Star Color Princess Pen and weaken Garuouga's bracelet, forcing him to retreat. After the final Star Princess is revived, the power of all the pens brings forth a new pen that transforms Fuwa into a new unicorn form.

The Star Princesses explain that the Cures must continue to help Fuwa grow in order to restore the universe. Garuouga once again shows up to try and capture Fuwa, revealing how he came to rely on Darknest's power after failing to save his own planet. Steadfast in their desire to protect Fuwa, the Cures use the new Shiny Twinkle Pen to call upon a new power to destroy Garuouga's bracelet, after which Darknest leaves a cryptic message about Fuwa being a vessel. Afterwards, the Star Princesses tell the girls that they must search for something known as Twinkle Imagination in order for Fuwa to reach her full power.

While the girls have heaps of work to do upon returning to school, Fuwa becomes impatient waiting for them to finish as she wants to search for Twinkle Imagination. Running off on her own after the others call her selfish, Fuwa runs into Kappard, who turns Hikaru's pet dog Yeti into a shield. As Hikaru tries to save Yeti, Fuwa manages to use her new warping ability to aid her, allowing the Cures to rescue Yeti.

The girls are greeted by a catcus alien named Saboro, who is believed to be an inspector from the Space Alliance. Finding that Saboro doesn't use speech, Elena communicates with them using their gestures and shows them around town. However, Saboro becomes upset after Elena shows them her flower shop, leaving Elena to believe that she offended them. Upon learning that this Saboro is actually just a visitor, Elena searches for Saboro, only to discover that Tenjou has turned him into a Notray. Expressing her desire become friends with Saboro, Elena manages to hold them back so the Cures can purify them. Coming to understand Elena's feeling, Saboro changes their form in the hopes of making new friends across the galaxy.

Madoka, who is approaching the end of her term as student council president, nominates Hikaru as a candidate for the next president, with Sakurako running against her. As Hikaru pushes herself to act like Madoka to try and win votes, she finds a notebook dropped by Sakurako detailing the various ways she hopes to make school a safer and more relaxing place. Just then, Kappard targets Sakurako to power up his weapon. However, Hikaru's desire to understand Sakurako awakens a power inside her, allowing her to defeat Kappard. Afterwards, Hikaru relinquishes the election to Sakurako, believing she is better suited to be her own kind of president.

Learning that a mafia boss named Don Octo possesses a Rainbownian ring, Yuni once again takes on the guise of Blue Cat to try and steal it, much to others' chagrin. Sneaking into Don Octo's hideout and retrieving the ring, Yuni finds herself up against a newly appointed space police officer named Ann, only for both of them to be caught by Don Octo. Just as the girls rescue them the duo, Tenjou appears and turns Don Octo into a Notray. With the support of both Ann and the Cures, Yuni manages to defeat the Notray and uses her honesty to convince Don Octo to give her the ring.

Hikaru and Lala decide to participate with their class in the Halloween costume contest held in the commercial district of the city, disguised as UMA, which includes Elena and her family, Madoka and Yuni. Kappard, meanwhile, recalls his planet of origin that has now been destroyed and vent his frustration that he has lost it: the Pretty Cures, in order not to frighten the crowd and make them discover the existence of aliens, improvise a scene disguised as fighters and push the enemy away to confront him. The best Halloween costume contest is finally won by Hikaru and Lala's class, by Elena and her family, by Madoka and Yuni and, curiously, also by Kappard.

Finding no clue as to what and where the Twinkle Imagination might be, Pretty Cure decide to enlist the services of Yuni's old acquaintance who inspired her to infiltrate the Notraiders as Bakenyan: The famous fortune-teller Hakkenyan of planet Uranine. Yuni is rather hasty and wants to quickly find the Twinkle Imagination to restore Rainbow, with Hakkenyan advising her to observe what is around her. But Yuni gets attacked by Eyeone who traced the Princess Star Color Pen's signal to her location, realizing that her deception caused Eyeone to be exiled by the Notraiders and from ultimately the only home she ever knew. With this realization over how similar their pain of losing their respective homes are, Cure Cosmo forgives Eyeone and awakens her Twinkle Imagination which allows her to purify Eyeone along with the other warriors. Yuni offers Eyeone her hand in friendship and to live on Earth with her and other Precure, only for Eyeone to refuse and take her leave.

Elena's teacher announces that the school will be holding an English Speaking Contest and that Elena has been chosen to represent the school. Tenjou decides to disguise herself as a guest teacher and use her cover of mentoring Elena to capture Fuwa. But Tenjou ends up recounting memories of her home world during her interactions with the Precure. Elena writes a speech about how Smiles can connect people, but Tenjou tries to get her to write one about her feeling alone, which brings up old memories for Elena. The next day Elena gives a new speech but is able to use the experiences she had as a child to convey her original idea better. Elena receives a round of applause before Tenjou publicly denounces her speech and runs off with the girls chasing after her, with Tenjou exposing herself before attacking them with a Notray created from the school Principle. But the Cures succeed in defeating it.

Madoka's Father, Fuyuki, receives a picture of Lala during the last Notraider attack and confronts her at the spaceship. Although Hikaru and Elena defend her with the help of Abraham and Yuni, Fuyuki still doesn't believe them and vows to discover the truth. The next day at school, everyone begins behaving strangely towards Lala. Hikaru confronts the class and finds out from Sakurako that Fuyuki spoke to her about Lala being an alien and that several members of the class remember strange things happening whenever Lala was around. Lala overhears and runs off but Hikaru finds her in the library and comforts her. Kappard then attacks the school and attempts to take the class's twisted imagination but Lala and Hikaru come to rescue them, with no other option but to transform with the other Cures in front of everyone revealing their identities. Kappard attacks everyone but Lala defends the class who begin cheering her on, causing their twisted imagination to disappear and forcing Kappard to take Fuyuki's instead. Kappard continues to bear down on Lala but she comes to realise that she was happy with everyone and just wants to be herself, awakening her Twinkle Imagination. Lala uses her new power along with the other Cures to defeat Kappard. Afterwards the whole class defend Lala against Fuyuki's accusations, and accept her for who she is.

Madoka holds an assembly to officially hand over her duties as student council president to Sakurako, learning later from Fuyuki that she is to study abroad in London once she finishes middle school. The next day, while eating donuts with Hikaru and the others, Madoka expresses her concerns to Elena. Madoka feels that her nickname as the Moon may have more truth to it than they realize due to depending on others to shine, though Elena tells Madoka that could shine on her own if she really wants to. Garuouga then suddenly appears and uses Darknest's power boost to overwhelm the PreCure, telling Madoka to surrender as he sacrificed everything to acquire his power. But Madoka realizes that she can decide things on her own and does not need to rely on others to shine, awakening her twinkle imagination. With her new power, Madoka and the other Cures manage to defeat Garuouga. Later Madoka tells her father that she hasn't decided if she wants to study abroad yet, but wants to decide things on her own with Hikaru and the others.

Madoka tells Hikaru and the others about her choice to decide things on her own, before discussing with Elena about her future. Elena says she plans to help out her family by attending a local high school. The next day Elena has her parent-teacher meeting with her mother at school, when Elena doesn't show much interest in what she wants to do, her mother becomes worried about it. Later, Madoka speaks to Elena, sensing something is wrong and wanting to repay Elena for helping her to decide her own dream. Elena admits she is unsure about her future but Madoka encourages her to think about it. Tenjou appears and turns Elena's mother into a Notray, causing Elena to realize that her mother has noticed she isn't truly smiling. Elena becomes downhearted and is beaten down by the Notray but the other Cures manage to encourage her enough to defeat the Notray, though it was a bittersweet win from Elena's perspective.

The Cures learn from the Starscape Alliance that Planet Guten may provide them with the technology they need to locate the Notraiders' planet. Upon arriving to Guten, the Cures learn the planet is Tenjou's home world from seeing the long-nosed denizens. They also discover that the Guten residents take pride in their long noses while looking down at those whose noses are small. Elena gets separated from the others while sightseeing and gets attacked by Tenjou before the others come to her aid. Hikaru knocks off Tenjou's mask, revealing Tenjou to have a small nose with her distain of being patronized by her people being the reason she joined the Notraiders. Tenjou then turns herself into a Notray and defeats the others the Cures before attacking Elena , who begins to understand Tenjou with the realization of wanting to make her and everyone else smile awakening her Twinkle Imagination. After the Cures manages to defeat Tenjou, she takes her leave despite Elena's attempts to reconcile with her. Back home, Elena confesses her feelings to her mother while deciding to become an interpreter.

Abraham contacts the Cures about a Spaceship that has crashed near by and asks them to help with the rescue. At the crash site Hikaru initially mistakes the alien for Santa Claus, however Yuni informs her that it's actually a Santanian, who gets delight out of surprising people with presents. The Santanian has come to earth to give presents to children but unfortunately the delivery robot has malfunctioned in the crash, so the Cures offer to help instead. With Fuwa's warp ability, the presents are delivered in time so the Cures enjoy a break while flying through the sky. Elena reveals to the others her decision to become an interpreter, and everyone starts to discuss what they'll do in the future, when suddenly they are attacked by Darknest. Darknest attempts to take Fuwa but the Cures manage to defeat him, only to discover it was really a Notraider disguised in armor. The following morning, all the children wake up to their presents and the Cures say farewell to the Santanian.

Hikaru thinks about how to awaken her own Twinkle Imagination, being the only Cure to remain to do so. Once day during a walk in the rain with Lala, they meet their classmates who all start asking Lala about her home planet and the Rocket, so Hikaru uses this as an excuse to go off on her own. Hikaru comes to the Observatory and speaks witht Mr Ryo, admitting she's been feeling upset lately as all her friends seem to be moving on without her. Mr Ryo tells Hikaru that its normal to feel that way, before telling her about the star Deneb in the constellation of Cygnus and that it will eventually become the pole star but continue to shine the same. Hikaru heads home but is confronted by Kappard, who uses his own twisted imagination to transform his staff and attacks Hikaru, managing to beat her down before the other Cures arrive. Kappard tells the story of how his planet was destroyed because its citizens thought they could get along with those from other planets but ended up being taken for granted, believing its impossible for different planets to coexist with each other. Lala tells Kappard that he's wrong and that her classmates accepted her when they found out the truth and that Hikaru is fine the way she is. Hikaru suddenly realises what Mr Ryo was referring to with the story of Deneb, and tells Kappard that despite things changing, she'll continue to shine on her own, awakening her Twinkle Imagination. The Cures manage to defeat Kappard, but he is transported away before Hikaru can reconcile with him.

The Cures are called to the Star Palace by the Princesses to conduct a ritual with Fuwa and the Twinkle Imagination that will allow them to bring peace to the universe. But the Cures fight Garouga, Tenjou and Kappard when they attack the palace, the three revealed to be wearing special armor that Darknest provided to convert their twisted imagination into power. The battle is soon joined by the Starscape Alliance with Eyeone now supporting the Cures, Hikaru eventually attempting to convince both sides to cease fighting. But Darknest uses the Notraiders' armor to destroy the palace's barrier and immobilize the Starscape Alliance, revealing her true identity as the thirteenth Star Princess Ophiuchus. Ophiuchus explains that she became disillusioned with the universe she and the other Princesses created together, revealing her goal of using Fuwa to erase it to her subordinates' shock while revealing that she destroyed Garouga's planet. Ophiuchus soon places Garouga, Tenjou and Kappard under her control before the Curse exhaust their Twinkle Imagination to purify them, Ophiuchus uses this opportunity to capture Fuwa and the other Star Princesses before departing with the Star Palace.

The Starscape Alliance rescue and tend to all the Notraiders, with Garouga explaining to the Cures that Ophiuchus took Fuwa and the Star Princesses to their world to complete the ritual, as she needs the piece of the planet she brought with her when she arrived. Though the Notraiders can no longer warp to their base, Topper reveals the mission to planet Guten allowed to locate the planet with the Cures and their former enemies using that time to reconcile with the Notraiders offering their help. The group arrive as Ophiuchus is ready to commence the ritual to erase the universe, Notraiders distracting her so the Cures can reach the Star Palace. During the confrontation, exiled by her fellow Star Princesses when she opposed their decision to bestow half of their power in all living things in the form of imagination, Ophiuchus how she gradually regained her powers and assumed the identity of Darknest to exact her revenge. She also reveals Fuwa is part of the Star Palace infused with the other half of the Princesses' power, and that she cease to be if the Cures were allow to commence their ritual. The revelation causes the Cures become hesitant to fight back against Ophiuchus, but Fuwa takes the girls' Twinkle Imagination to fight back, sacrificing herself to save the universe.

Despite Fuwa's sacrifice, Ophiuchus manages to survive the ritual because Hikaru's feelings of losing Fuwa came into conflict with it. Ophiuchus begins the ritual to cover the universe in darkness and erase it, luckily the Precure manage to survive thanks to the power of their pendants. While lingering in the darkness, Hikaru comes to realise that Fuwa and the universe still exist in their hearts and vows to continue to protect it. The Cures manage to transform into their Twinkle Styles and confront Ophiuchus, revealing that the power of imagination is entirely their own. The Cures defeat Ophiuchus and restore the universe, when Ophiuchus asks why she was spared, Hikaru says she wants her to see the universe they'll create. Ophiuchus admits defeat but decides to leave, vowing to return if things become twisted again. With their new power of imagination the Cures manage to bring back Fuwa but unfortunately she no longer has her warp abilities. The Princesses agree to take care of Fuwa at the palace but Hikaru, Elena and Madoka must return to Earth, meaning they must say goodbye to Yuni and Lala. Hikaru says a tearful farewell to Lala before leaving through a portal created by Garouga using Ophiuchus' damaged bracelet. Back on Earth, Hikaru, Elena and Madoka vow to see their friends again someday.