Author's Note

This chapter ended up being a little hard to write. I want to introduce S4 more first but then thought maybe introduce M4 a bit as well. Kind of like how Aikatsu Star did it, but in a little more... normal method? Either way, because of that, this chapter end up becoming the longest one so far.

Also, thanks to all that favorited this cross over. I'll keep working hard on this and I'm open to any types of reviews and suggestion. I hope to bring this crossover to become something really amazing.

Update

Minor dialogue change

one additional minor scene

Chapter 5: S4 & M4, Four Star Academy

Within a building in a world with the dark sky, a man in suit knocks on a door.

"Come in." The person inside replies.

The man opens the door and closes it gently. He walks over and bows over in a perfect 90 degree. "Sir, I apologize for my mistake. I was unable to launch the attack successfully."

The man sits on the chair replies "Don't worry, Gyaku. It isn't your fault that the attack failed. I didn't think the Precure from Majorland could travel over to that world either. Not only that, they already found a new companion."

Gyaku apologizes again "I'm sorry, I could have stopped it but…"

The man then stops Gyaku "I said it is not your fault. Don't make me repeat myself again. The most important thing is to find out a way to defeat them. If possible, I do not want to use those things."

Gyaku then looks at him with confidence "Do not worry sir, I have a few plans in mind. I'm sure I will be able to defeat them soon."

The man then nods and say "Very well, take your time. A few failures are alright. Just make sure you stop them before I consider using alternatives, understand?"

Gyaku then stands up proudly "I will not fail you. I will make sure to succeed." He then teleports away.

The man then turns on a tablet on his desk. It shows an image of Cure Diva and Yume side by side. He then leans back on his chair then turns around and looks out of the window.

He then says "Cure Diva, Nijino Yume, the new precure. Is this destiny? Or…" The man continues to look out of the window, into the dark sky.

Inside a dorm room within the Four Star Academy, Yume is showing Hibiki and others their place to stay.

Hibiki then questions "Ummm, Yume. Are you sure it is okay for us to be here?"

Yume nods "Yes, starting from today, the four of you are students of Four Star Academy."

Kanade then asks "How? This kind of thing usually requires permission, right?"

Yume answers "Of course, but we already got the permission from your guardian."

Hibiki, Kanade, and Ellen together "Eh?"

Ako then holds out her Live Module "My mother gave permission."

The Live Module flips open and a hologram of Aphrodite pops out. Everyone except Yume is surprised by it, but they are able to guess what happened. Ako then starts telling them how they are enrolled in the Academy.

Inside of the Headmaster's office, Yume, Ako, and Moroboshi are having a small meeting. Moroboshi is asked to let Hibiki and others, including Yurina, to enroll in Four Star Academy.

He looks at Yume and Ako "The five girls definitely have potential. However, only Yurina has permission from her parents or guardians so far. I still need it from the four of you. Being here means to become an idol. The Aikatsu world can be quite rough after all."

Ako answers without hesitation "That's not a problem." She then held out her Live Module and the hologram of Aphrodite shows up. Moroboshi and Yume are both surprised by it.

Aphrodite then greets them "Hello, I'm Aphrodite, Ako's mother."

Yume greets her "Ah, hello. I'm Nijino Yume! Please don't worry about Ako. Us S4 will definitely help them when they need it."

Aphrodite nods and smiles "I understand what happened. I'll leave Ako and other girls to you."

Yume "Yes!"

Moroboshi then greets back as well "It's nice to meet you, Aphrodite. I assume you already heard of the situation?"

Aphrodite nods "Yes and since I can be considered as their guardian, I should be able to have them join the academy. Their parents already gave me their consent."

Moroboshi then pushes his glasses and says "If that's the case, then all we have left is the paperwork. We should be able to get all of that done soon, so for now, I congratulate your daughter and her friends on successfully enrolling the Four Star Academy. Our school welcomes them with open arms."

Ako then says "And that pretty much sums it up."

Yume then nods "Yeah, I don't know how but it seems like the paperwork was done just fine."

Ellen then responds "As expected of Aphrodite."

Hibiki then looks around "I guess we all have a roommate? In that case, Kanade!"

Kanade then sighs "Alright, but there will be a few rules, okay?"

Hibiki then whines "Ehh? Do we really need to?"

Kanade responds "Hibiki…"

Hibiki couldn't help but says "Ah, alright. A few rules, right? Let's make a few rules."

While the two are discussing their rules, Yume looks at Ellen and questions "Are they trying to be a comedy duo or…"

Ellen shakes her head "No, this is how they are every day. Despite that, they are still best friends."

Yume then says "I see. Well, since these two will take this room, the two of you will be in the room door." Yume looks at Ellen and Ako.

Ako then looks at Ellen "Ellen, let's go. We should get some things done today. Classes start tomorrow after all."

Ellen nods and the two of them leave the room with Yume.

In the next day morning, Hibiki and others meet with Yume while another woman stands next to her.

Hibiki and others greet them "Good morning!"

The woman put her hand on her hip while Yume responded "Good morning but… what happened?"

Yume looks at Hibiki and Kanade. Both of them have bags over their eyes. They look at each other and sighs.

Ako then answers "It seems like they just couldn't agree on the few rules. In the end, they stayed up all night."

Yume then makes a wry laugh "Hahaha… That's… something."

The woman then says "That's not good, baby. This isn't good on your first day. But before you ask who I am, I'm Hibiki Anna. A teacher here at Four Star Academy!"

Hibiki then says "Hibiki sensei… This feels weird."

Anna then responds "Right, you are Hojo Hibiki, right? Baby. In that case, you girls can just call me Anna sensei instead."

Yume then notices they have the same name "Oh right, both of you have the name Hibiki."

Anna turns around and looks at Yume "Don't tell me, you forgot my full name."

Yume then immediately denies while shaking her hands "Absolutely not. There is no way I would forget that."

Anna looks at Yume with doubt but lets it go "Well, whatever. As for you girls, I'll explain the difference between the four classes here."

Hibiki and others listen to Anna about how Four Star Academy work. Anna explains the main difference between the four classes: Flower Song Class, Bird Theatre Class, Moon Beauty Class, and Wind Dance Class. Anna goes into detail regarding the S4 and each class relation to each of the members. Hibiki and everyone then looks at Yume.

Yume then says "That's right, I more or less help to create the training schedule. On top of keeping up our Aikatsu, each of us S4 members also helps with fellow students."

Anna then follows up "That's right, on that note, the same kind of goes with M4. Ah, M4 is basically the same as S4 but for the boys."

Yume nods and looks at each girl closely. After a few seconds, she says "Students usually choose what class they want to join themselves but… want my suggestion?"

Hibiki and others look at each other. Kanade then says "That would be great but… is it alright?" Kanade looks at everyone and they all nod.

Yume then smiles and says "Great, then let's begin with you, Kanade. Kanade should join the Moon Beauty Class."

Kanade response with "Moon beauty? That's…"

Ako then follows up "That sounds good. It seems like the type of class best for you."

Yume then says "It's a class focuses more on one's beauty and grace. Many of the idols in this class are sexy type. Though there are a few idols that are different. That's just the most common there."

Hibiki then looks at Kanade and teases her "Sexy type. I think it suits you, mistress Kanade."

Kanade then yells at Hibiki "Hibiki! Do you think that's funny?"

Hibiki then backs off a step "Wait, it's just a joke."

Kanade then proceeds to give Hibiki another lecture.

Yume then makes a wry smile "They really do it every day."

Anna then cuts in "Well, they could make a great comedy duo. As for Hibiki, let me guess Yume, you most likely think she should go to your Flower Song class."

Yume nods and explains "Hibiki's dance is alright but she definitely can sing well. With the right training, I'm sure she'll be able to perform really well."

When Hibiki and Kanade heard that Kanade looks at Hibiki "Hmm? Well, I guess that's true."

Hibiki then starts smiling and says "Hahaha, maybe I'll be able to join S4."

Kanade, Ellen, and Ako all just sighs. Yume on the other hand, nods and excitedly says "I'll be waiting; for the day we stand on the same stage."

Ellen then questions Yume's response "Eh? Is that okay?"

Yume looks at Ellen "Yes and Ellen, you should join the Bird Theatre Class. I don't think you'll be able to learn much from any other class. The Bird Theatre Class will help you the most."

Ellen pounders and eventually agree "You are… right. Ah, then for Ako is?"

Ako then speaks up "I will go to the Wind Dance Class. If we are going to do this, this is probably the best option for me."

Yume looks a bit shocked that Ako notices "Yes Ako, that would be the best class. The performance you made during the audition, it was great. You seem to understand what is needed on the stage so becoming able to properly dance however you need, it would be ideal."

Ako nods then Anna smiles and agrees "Yep, that's all true. It is most likely the best option. Of course, you girls are still welcome to choose any class you want, baby. There is still some time so choose carefully."

Hibiki and others says "Yes!"

Anna smiles and takes out a few devices and cards "Then take these. It's student cards and Aikatsu Mobile." The girls take it and starting to fiddle with it.

Yume then says "Anna sensei, we should get going soon. I also need to make my preparation."

After a small chat afterward, they split up and Hibiki and others decide to think about it by themselves.

Within the campus, Hibiki is walking around while thinking about what she should do. It isn't long before she ends up crashing into someone.

The man says as Hibiki falls down "Ah! Hey, are you alright?"

Hibiki blinks and then looks at him "Ah, yes, sorry. I was thinking about something." As Hibiki answers, he helps Hibiki get up.

He then looks at Hibiki then asks "Thinking about something? In that case, maybe I can help." He smiles and Hibiki blinks a few times. She sees a short blonde boy that Hibiki finds cute.

She couldn't help but mutter "Cute…"

The boy didn't hear her answer and asks "Sorry, what was that?"

Hibiki then immediately says "Oh no, nothing. I.. I am Hojo Hibiki. I was just thinking about which class to join."

The boy then answers "Ah, a new student. Or rather, transfer student? You should definitely choose carefully. But… You got a pretty nice voice. Why not try the Flower Song Class? The top of the class happens to be a world top idol. I'm sure you'll learn a lot from her."

Hibiki flusters and answers "O, Okay. I was told to join that class but I wasn't so sure."

The boy then introduces himself "Oh! By the way, I'm Kasumi Asahi, one of the M4 members."

Hibiki then says "M4, they are like S4, right?"

Asahi smiles "Yep, that's me!" The two of them then have chitchat regarding the school for a while until several minutes have passed

The boy then turns around and says his goodbye "Well, I got to go." Asahi then runs off.

Hibiki looks at Asahi going off while she is determined to join the Flower Song Class.

As for Kanade, she is walking down a hallway as she complains about Hibiki.

Kanade mutters "That Hibiki, I know it's a bit much to ask but she can at least try to comply. Not only that, but she also makes that bad joke. She makes it sound like I'm a bossy person." While she is walking and complaining, she overheard a conversation.

The first girl "Yes, I'll be staying here a bit longer, Koharu."

Koharu "I see, I didn't know what to do when I overheard your conversation."

The first girl "Don't worry, I won't suddenly disappear. I still have a lot to do here."

Kanade then takes a closer look. She notices that the first girl is actually Kasumi Mahiru. She then checks with herself "If I remember right, she is also a member of the S4."

The two girls then see Kanade and Mahiru waves at her.

They move closer to Kanade and Mahiru says "You are Kanade right? Yume told me about you and your friends."

Kanade blinks and questions "Yes, but how do you know it's me?"

Mahiru answers "Because Yume showed us the footage of you and Hibiki. On top of that, Yume is definitely right. You are suited for the Moon Beauty Class. If you want, I can show you the way."

Koharu nods then follow up "You have good style. If we dress you up a bit, I'm sure you will fit in right away."

Kanade then takes a step back "Ah, I'm alright. I was just thinking about which class I'll join, but I'm alright right now."

Mahiru then looks at Kanade "Really? We can pretty you up really fast."

Kanade then hesitantly replies "Well, that sounds nice but… I can't bother you two out of nowhere."

Mahiru then laughs lightly and smiles "You don't need to worry about that. It will be done very quickly."

Koharu then says "That's right, You will look exceptional in no time. Now, let's go!" Koharu and Mahiru then pull Kanade away.

Ellen is in the woods, pondering if she should take up the challenge. It was then, Hummy jumps and lands on Ellen's face.

She pulls Hummy off her and asks "Hummy, what are you doing?"

Hummy answers "Siren, this is not like you-nya. Didn't you decide to not worry and just go for it-nya?"

Ellens curls up into a ball and says "I know but… Why does it have to be the Bird Theatre Class? To do all that on stage is…"

Hummy jumps and gives Ellen a tap on her forehead "That's wrong-nya. You had always stand on the stage and sing for everyone-nya. What are you scared of-nya?"

Ellen then looks up and then at Hummy "It's just… I'm scared that I might lose my way again. Just like that time when you were chosen instead of me."

Hummy then crosses her arms and says "It'll be alright-nya. even if it happens, I'm sure Hibiki and others will bring you back again-nya."

Ellen then picks up and hugs Hummy "I'm sure they would but… I'm not going to give in again. That's right, as long as Hummy, Hibiki and others are with me, I'm sure it'll be okay."

Hummy then happily says "Siren~" The two snuggle closely and stays like that for a while.

Ako, on the other hand, is sitting on a bench at the track field. She is looking over the field from above and sees a few idols exercising. After a while, two people caught her eyes.

A blue-haired girl is helping a petite brown haired girl's training. She is running but looking totally exhausted. After a few more minutes, The blue-haired girl finally let her rest.

The Blue-haired girl walks closer to her and says "Ako, what have you been doing? For you to be out of breath from just that, that's unacceptable from S4 member."

Ako then remembers the brown-haired girl "She is, I see. For a top idol… I guess that is unacceptable."

Saotome Ako heard it with her and turns around "Who are you to say that? You don't know how this happened!"

The blue-haired girl then knocks on Ako's head "Sorry, she isn't in a good mood right now. Hmm? Are you perhaps… Ako?"

Both Ako answers "Yes."

Saotome then looks at the other Ako "Do you mind be quiet for a moment? I believe Tsubasa senpai is talking to me right now."

Shirabe retorts "You are wrong, it is at me."

Saotome then glares at Shirabe for a second then turns around to Tsubasa "Tsubasa senpai, you are talking to me and not that random person right?"

Tsubasa casually says "Ah sorry sorry, I was talking to her. She is one of the new students that Yume picked up from that audition."

Saotome "No way, this little girl?" She then looks at the little Ako then back at Tsubasa "Why?"

Tsubasa answers "Because Shirabe is the youngest while she is able to keep up with everyone else."

Saotome then mutters "That sounds like Yuzu senpai"

Shirabe then questions "Yuzu?"

Tsubasa then says "Let me tell you about Yuzu. Yuzu was an S4 member who graduated from middle school like me. If you have any questions, you can ask me or Ako here, Ako."

Shirabe then says "Right, but that was kind of…"

Saotome then stares at Shirabe "Ahh, that's it. Let's decide who keeps the name Ako!"

Shirabe then says "You can keep it, Shirabe is fine." She then stands up and tries to walk away.

Saotome then taunts her "Running away? I guess that's just how far you'll go as an idol if you give up that easily."

Shirabe glares at her but before she says anything, Tsubasa cut in.

Tsubasa then says "Then lets about settling it like an idol. Though it won't be fair to Shirabe so how about this? Saotome, pick a song you want and the two of you will do a live together. I'll be training Shirabe so she can at least follow your steps. If she can keep up all the way, she wins. How about this?"

Saotome nods "Sounds good to me." Then turns to Shirabe "I'll go get ready, take as much time as you need." She then runs off.

Shirabe didn't get to say anything and complains "Wait, but I… didn't agree."

Tsubasa "It's okay, it'll be a good experience."

Shirabe "Well… fine. But please go easy on me."

Tsubasa then walks closer and says "Alright, no time to waste. It's the special training time!"

When it's time for Hibiki and others to meet up, everyone but Ako is there. Hibiki and Ellen couldn't help but is shocked by the makeover Kanade received. Her ponytails are let loose and got a wavy look. She also receives nice makeup with a new dress that emphasizes her figure a bit more.

Ellen asks "Kanade, what happened?"

Kanade answers "A lot happened and… I think I'll join Moon Beauty Class like Yume suggested. All those dress and makeups, it's actually quite interesting."

Hibiki "I see, so Kanade is going to become a mistress after all."

Kanade "Hibiki! That's enough! So? What about you?"

Hibiki then says "Well, me too. I think I'll join the Flower Song Class."

Ellen also agrees and they each tell others what happened. However, when they are done, Ako still hasn't shown up. After they waiting a bit more, they can't help but worry.

Hibiki says "Really, what is Ako doing?"

Kanade responds "I hope she is okay. Ako isn't the type to be late for no reason."

Ellen nods "Yeah…"

At this time, Hibiki's Aikatsu Mobile rings. She picks it up and it is Yume.

Yume says "Trouble! Are you with Kanade and Ellen?"

Hibiki answers "Yeah, we are together, but what happened?"

Yume then says "Come to the concert hall. It's easier to explain if you girls are here. If you don't know where it is, the location is in the Aikatsu Mobile."

Hibiki looks at everyone and they all nod. She then answers "Alright, we'll be there right now."

When everyone is in the waiting room with both Ako, Hibiki asks Yume what is happening. Yume then explains to them what happens.

Ellen then comments "Ako, she got dragged into trouble again."

Hibiki tries to look away "Well, you know? Sometimes it is inevitable."

Kanade then follows up "Hibiki… Ako isn't like you. Well, so what is happening?"

Yume answers "It looks like they will be doing a live soon. They'll both be using the same coord and the Song will be one that Ako... I mean Saotome choose."

The girls then look at the two of them. However, they simply look at each other until it's time for the stage.

Saotome looks at Shirabe "Are you ready? If you want to run, this is your last chance."

Shirabe sighs and starts walking to the changing room while saying "Let's just get it over with." Saotome then runs up and tries to get ahead of her.

Yume can't help but looks at Saotome with a loose smile "Ako… Ah! What song did they pick?"

Tsubasa answers "It's Animal Carnival. She picked a song that's not too hard and it really fits the two of them."

Yume nods "Yes, the choreography isn't too hard either. Even though Ako looks like she is picking a fight, she is looking after her."

Hibiki then raises her hand and asks "Should we go watch them in person? The live should start soon."

Everyone agrees and starts moving towards the audience area.

When they reach the area, they also see Nozomu, Asahi, and Kanata.

Yume surprisingly asks "You guys, why are you guys here?"

Asahi answers "We heard what happened so we came. Kanata seems to be the one who wanted to come the most though."

Kanata retorts "Of course, if an S4 member is actually picking on a kid, that's not good. Though I don't think that's the case…"

At the same time, Hibiki quickly takes a seat and sometimes takes a glance at Asahi.

Kanade sits next to her and asks "Hibiki, are you perhaps?"

Hibiki looks at Kanade and shakes her head "No no no, it's just… they are M4, right? Why are there only 3 of them?"

Tsubasa who happens to be close to them answers "The last member, Subaru is on a tour on his own. After Yume becoming a world top idol, he started going on a tour."

Soon after the short conversation, the performance is about to start. Everyone sits down and the live soon starts. Saotome immediately shows her skill and her aura shows up very soon. Shirabe however, is managing to keep up and not make any mistake.

Saotome "The sun is smiling, and hey, the birds and plants are singing a melody."

Shirabe then follows up "The scent of flowers and water, now let's go to our favorite place."

Saotome "Raise your hands out like they're wings, and strike a pose."

Shirabe "Now, let's quickly do a little spin and dive into the next branch."

…

The two keep going while Shirabe manages to keep up, barely.

Saotome thinks "Amazing, as expected from Yume. She really found amazing people. However, I can't lose here, my name is at stake here!"

Saotome's aura becomes stronger and overshadows Shirabe's performance. However, Gyaku happens to be nearby. He took a peek and listened into Saotome's heart.

Gyaku then says to himself "Lucky me! Found someone useful. One's name is definitely more important than some lousy live performance and that aikatsu stuff."

As the performance comes close to the end, Gyaku points at Saotome and transforms her into Negadol.