Yui Yumekawa is a sixth grade boarding student at Avocado Private Academy where BoyPara, boys who are idols, is very popular. She loves to daydream about becoming an PriPara idol also called Delusion Time which causes her to be late occasionally. When she is running late to class, she sees a Prism Stone shop opening up. When she is looking at the Prism Stone store, Laala Manaka, who is a Divine Idol in season 3 of PriPara, collides into Yui. The Principal Babaria introduces Laala as the new transfer student. Yui thinks Laala is joking that she is a Divine Idol from SoLaMi SMILE. After class, she goes to the new store, where she meets Laala. They both enter the gate, unfortunately Laala can't PriPara Change, looking the same age in her new school, due to running into Yui and bending her PriTicket. When they enter into Paparajuku PriPara, they get Idol Watches which they have to max up all way to get a performance. Then Yui meets the mascot Punicorn which becomes her manager and max out her Idol Watch. Then she performs a three-minute performance on stage, using a pre-made making drama which Mirei and Laala did in season 1, the very first performance in Paparajuku. After the performance, Laala and Yui become roommates after running into the dorm before 5:00 due to Principal Babaria strict dorm rule where they trade Friend Tickets.

Yui asks why Laala is here in Parajuku, Yui believes that Laala got stranded after a boat crash and her stepmother casted her out. While Laala explains that the other two Divine Idols, Sophy and Mirei went to different cities to hype PriPara in the respected cities. When Laala and Yui are on lunch break, Laala never knew there was a Boy PriPara, BoyPara, in Paparajuku. During lunch break, Principle Babaria tells all the student that PriPara is for only boys and the female idol is the epitome of unseemliness, banning all the girls to go to Girls' PriPara. The Principle Babaria calls Yui into her office to have her weed out the school's entire rear-grounds without getting any help due to performing in PriPara. When Yui begins her weeding, Laala tries to get the cheerleaders to come to PriPara. The cheerleaders says they are going to watch the BoyPara and they transform in sheep uniforms and goes into a tunnel with Yui and Laala staying outside. Yui goes back to weeding while Lala enters the tunnel and tries to find a way to get to the girl PriPara. Minami Mirei calls Laala and ask her how she is doing in Parajuku which Laala lies that she is bringing a lot of idols to PriPara. After the phone call, Laala begins to dig a tunnel with a spoon first, then a pickaxe while Yui still weeding the next day. The next day, Yui and her two friends, Hana and Suzu, help Laala to finally dig a tunnel to PriPara. The four girls enter PriPara and Laala's Idol Watch maxes out due to digging the most where she transforms into the grownup Laala in SoLaMi SMILE which surprises Suzu, Hana and Yui, who finally believes she is a Divine Idol. She does a three-minute performance and does a speech after her performance saying PriPara is place that all girls' dreams can be granted while Suzu and Hana realize that girl idols are fun too and want to go back to PriPara. After the speech, Meganee announces they are going to have a competition in June.

Laala and Yui make the tunnel safer to travel to Girls' PriPara. When they are discussing about making drama, Suzu and Hana tell them not to discuss it at the table because of the head disciplinarian Mimiko who can hear anything a kilometer away. They ask schoolmates for ideas for the making drama. They are then confronted by the Principal saying if they get into Girls' PriPara, they will have to weed out the grounds. They go back to dorm to eat while Laala notices a book she saw before where Yui says it is her dreamy-cute design book. Yui tells her she has more and opens up the closet and all the books collapse on Laala which Yui says she has been designing them when she was three years old. Mimiko does an inspection in the dorm at 9:00 saying they cannot eat after 8:00 and has strict rules in the dorms. Suzu and Hana say that dreams and freedom are both denied here. Laala and Yui go outside sneakily to cook a midnight snack where they find the Principal watching the BoyPara where Yui cooking machine, Cooky, said something aloud. The Principal puts on the siren and headlight from the tower of school while Nino is doing her late night run, she collides into Laala and Yui. She helps them get away from the headlights and they both get into the tunnel to cook ramen with Cooky with sheep costumes then bird costumes and this helps Yui to make her making drama. Her Idol Watch maxes out and Laala brings some more people where Yui finally does her making drama in her performance. After the performance, a PriPara Cafe building comes out of nowhere and Meganee announces the name for the competition, Idol Time Grand Prix, where she tells the girls if they don't get any participants the Paparajuku PriPara will be closed and Laala will be fired as a Divine Idol.

Laala and Yui hears that Mirei is coming to Parajuku. Laala and Yui panics because Laala told Mirei that she is bringing a lot of idols to Paparajuku PriPara. Laala decides to use the hologram trick that her sister used to create buildings and people in PriPara from Cooky. Laala tells Yui to wait for Mirei to come to Paparajuku PriPara at the entrance. Yui meets Mirei and thinks she is a new idol. They both go in and Yui is surprised that Mirei is another Divine Idol. Mirei is also surprised that Laala is short and Laala explains what happened to her. Mirei goes around PriPara and finds out that Yui and Laala are using holograms and mannequins. She hears from Laala that Paparajuku PriPara will be closed and Laala will be fired as a Divine Idol so she decides to help them get more girls into PriPara. Mirei brings a whiteboard and tells all the girls in Avocado Private Academy to come to PriPara. The Head Disciplinarian Mimiko gives 2 tickets to Mirei and Mirei tells Mimiko she is breaking one school regulations. She then tells Mimiko that she is the Exemplary Head Disciplinarian Champion and in the hall of fame. She puts all the tickets she got on her and put them all on Mimiko. She then asks everyone in the room if they want to got PriPara. While they are traveling through the tunnel Mirei tells Yui and Laala that they can stream PriPara on the internet. Some of the girls went into PriPara and are amazed and Mirei gets her Idol Watch Maxed out. The girls, including Yui, wants Mirei to perform. Mirei tells Laala that she wants to perform together and they did a performance together while Yui asks Meganee to stream the performance. The girls staying at Avocado Academy watch the performance and want to go to PriPara. After Laala and Mirei's performance, Laala and Mirei get Super Cyalume Coords. Another PriPara building pops up and Mirei tells Laala if she has trouble call her. Mirei's Idol Watch rings and tells her to go to Iparaki and Yui and Mirei trade Friend Ticket

Laala asks Punicorn if she knows how to be manager and able to reserve a venue. When Punicorns hears that she goes to sleep and Laala says that is not what a manager does. When Kuma arrives in Paparajuku to deliver shoes, he meets Laala and Yui and decides to train Punicorn. After Punicorn's training, she is able to reserve a venue which cause Laala and Yui's Idol Watches to max out and they do separate performances. During the performances, Head Disciplinarian Mimiko tries to block all the girls from watching the performances in PriPara and wonders how the two got in. After Yui performance, Punicorn hears something in the clock tower so she goes into the clock tower with Laala and Yui chasing after her. Punicorn meets a mysterious girl in the clock tower playing on a harp. When the clock gets to different time, the mysterious girl goes back to sleep. While Punicorn is in the clock tower, Yui and Laala try to open up the door but it is locked and they are amazed of the song. Kuma gets a message from his boss and Meganee asks him to deliver shoes to Parajuku. While he is on the way Punicorn thanks hims. Laala wonders why Kuma is in a Shoebill Uniform, Meganee tells her that Kuma made a mess in Parajuku and had his Manager license revoked which surprise Laala and Yui.

Laala begins a performance to attract girls to become idols. However, she is not successful and the girls leave PriPara to go to BoyPara. Laala decides to infiltrate into BoyPara. Principle Babaria knows that girls are going to BoyPara and wants to go herself. Then Head Disciplinarian Mimiko comes into the Principals office. Principal Babaria asks her to find out the entrance of all the girls that sneak into BoyPara. Laala and Yui joins the Sheep Squad. They do some sheep training and Yui smells some rice ball. She follows the scent and comes across her brother Shougo who rejects the rice ball to her. While she is doing that Laala decides to go into the tunnel but Head Disciplinarian Mimiko arrives at the entrance. Yui comes back needing a earmuff that she puts on Mimiko. The Sheep Squad, Laala and Yui goes into the tunnel while Mimiko is distracted. The Sheep Squad and Laala thank Yui for saving them. At BoyPara, Yui jumps and rolls on top of the males to get close to WITH. One of the male punches Yui into the air and she grabs the curtain on the ceiling. Shougo catches her and then kicks her out of the stage which Meganii is glad she is safe. After WITH's concert, Laala joins Yui in the room and she is surprised that Meganii is here in which he explains that he has two jobs, one in BoyPara and one in PriPara. Meganii delivers some advice to Yui and Laala in which Yui's Idol Watch maxes out. She does a performance and even the boy idols, WITH, in BoyPara are watching her. She is able to psyche and energize the crowd that all girls in the audience believe that PriPara is better than BoyPara. With WITH watching her show, Shougo gets annoyed that Yui interrupted his show and drew some of spotlight while the other members of WITH do like her show. Yui sends a present to Shougo which was embarrassing photos of him.

Yui thinks of a plan to bring a Divine Idol for a TV special, Sophie calls Laala and Sophie agrees to help them. The TV live is starting but Sophie is missing. Yui tries to find Sophie while Laala continue hosting the TV live. Yui found Sophie, who lost her stamina and Head Disciplinarian Mimiko stops them. Mimiko doesn't think Sophie is a Divine Idol because she has lost stamina was not cool looking. After Mimiko leaves, Nino arrives ask if Yui and Sophie needs help and she carries them both for her workout. Yui stops to eat rice and Yui gave a rice ball to Sophie that had a Red Flash. Sophie eats the Red Flash and she is able to get some more girls into PriPara from her cool look. Sophie enters PriPara and her Idol Watch maxes out for bringing some girls and she meets Laala who was waiting for her. Sophie gives a stunning performance that boosts ratings and she gets a Super Cyalume Coord while Nino is watching the show and she knows that Sophie is the girl she carried.

Yui and Laala want to invite Sophie and Mirei to the Divine Idol Contest in Paparajuku but Meganee tells them both that only new idols that performed here can participate. She also says that they can do the opening stage performance so Yui and Laala decide to scout idols. They try to scout Nino who does a lot of sports. They follow her to her sport activities and say that Nino must come to PriPara if they win. Laala and Yui fail in the activities except tennis. Yui and Laala get their Idol Watches max out for trying and they perform together. After performing together, Nino says that there is a connection between idols and sports. Yui and Laala meet Laala friends from Parajuku after they exit the stage.

Yui and Laala make flyers to convince girls to become idols. When the Head Disciplinarian Mimiko arrives, Yui and Laala escape. They are startled by Chiako who sneaks up on them and she does their hair. They drag Chiako to PriPara and she opens up a fashion store with simple stuff. Then it upgrades into a shack which causes a lot people to come to PriPara. The Sheep Squad arrives and argues with Yui and Laala that Chiako should stop going to PriPara for her friends and stick with BoyPara. In the end, Chiako decides not to go with both her friends, BoyPara and PriPara. After Chiako stop going to PriPara, the Fashion Studio was closed and that causes the decline of girls coming to PriPara. Laala disguises herself as WITH members to convince the Sheep Squad to let Chiako continue her dream. Yui is able to convince the Sheep Squad to come to PriPara to see how good Chiako is with her fashion studio. Now see her doing well in the fashion studio they decide to support her. Yui and Laala max out their Idol Watches and do a Duet performance. After the performance, the fashion studio changes to a PriPara Fashion Studio with Sheep Squad saying that Chiako will accept to become a Stylist in PriPara Fashion Studio and she can still go to BoyPara.

Laala and Yui still try to convince Nino to perform in PriPara. Laala and Yui try to do a showroom in Paparajuku Sports Competition selling rice balls, which didn't do anything. Nino wins every competition except That's How It Goes. In That's How It Goes, she meets Shion who proves to be better than Nino and Nino lost the game. Shion tells her that she is an idol trying to hone her skill. In paintball, Laala and Yui team up to get Nino but they were taken out by Nino. Then Head Disciplinarian Mimiko arrives to make Laala and Yui retire from being an idol. Yui begin to daydream and Laala wakes her up from her daydream. Nino throws Paintball smoke grenades and they try to escape from Mimiko. Yui protects Nino from Mimiko's Paintball gun and Laala gives a big Paintball gun to Nino and she wins the Paintball game. She then decides to go with Yui and Laala to PriPara and her Idol Watch maxes out for helping Laala and Yui. She does performance and Shion watches her on her phone smiling. Laala and Yui tell her about the idol Grand Prix which is on a Sunday and Nino tells them that she has softball game that day which shocks Laala and Yui.

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