Yuu Takasaki, the manager of the Nijigasaki High School Idol Club, woke up one sunny morning feeling rather groggy... She thought she had slept well, but when she tried to get out of bed, she just had no motivation. It was unusual for her to be so out of it in the morning. Not only that, but her body felt rather... heavy in certain areas. Her chest and ass felt almost swollen. She wondered if she was getting a cold. Hopping out of bed, she walked over to her bathroom and looked in the mirror only to see...
Kanata!?
In the mirror, Yuu saw the face of her sleepy upperclassman, Kanata Konoe! Her body as well! She turned around and saw she wasn't even in her own house! She had slept in Kanata's bed, and was in her bathroom!
Yuu was shocked for a moment, but quickly tried to rationalize the situation. Maybe she was still dreaming, surely this wasn't real... Yuu looked down at her new body. Her large breasts jutted out from her chest, something the flatter girl wasn't used to. Her violet pajamas had a few buttons unbuttoned at the top, exposing her massive cleavage to Yuu's tender eyes. The girl started to poke and prod all around her new body, and every single touch felt real. The idol club's manager cupped her hands around her breasts and gave them a few shakes, arousing herself.
"T-this is no time to be fondling Kanata's body... but when am I ever going to get this chance again..." she thought.
For the next minute or so, Yuu undressed out of Kanata's pajamas and examined her body fully. Kanata was a bit chunkier than the other Nijigasaki members, but she was by no means fat. It was the perfect amount of thickness that made her tits full, ass plump, and thighs to die for. Yuu knew this too, as she had spent enough time eyeing up the idols she managed.
There was no question about it, she had somehow become Kanata. Did that mean Kanata was in her body? She had to get to school to find out...
--
Chika Takami, the leader of Aqours was in a similar situation. She had awoken in an unfamiliar bed in an unfamiliar room. She walked down the hallway of a rather old fashioned looking house and stared in the mirror to see...
Honoka Kousaka!? Her idol!? The leader of μ's!?
Questions flooded her mind as Chika felt like she had stumbled into an alternate reality. Somehow she had become the one person she had admired more than anyone in the world, her hero... Chika stared at her new form in the bathroom mirror and wondered if this was the present day of 2015, or if she had somehow stumbled back in time to when Honoka was in high school... She walked back to Honoka's room and saw her Otonokizaka high school uniform hanging on the wall. Somehow, she was sent back in time to 2013, and was in the body of her idol...
--
It had been a rough morning for the leader of Liella!, Kanon Shibuya. At the moment she was being coddled by her "older sister", a girl named Dia Kurosawa. Somehow, it seemed she was in the body of a small girl named Ruby Kurosawa. She hadn't heard of these people before, so it was a surprise to her to find out these sisters were school idols as well, just like her.
Dia doted on her precious little sister, expecting her to look perfectly proper for another fine day of education.
"U-umm... Kurosawa-san?" Kanon said in Ruby's mousey voice.
"-San?" Dia questioned her younger sister. She was acting stranger than usual today. "What's wrong, Ruby? Why so polite? Just call me 'onee-chan' like you always do."
Kanon blushed at the thought. She was the older sister usually, so it was weird for her to be the youngest now.
"O-onee-chan..."
"See? That's better! Good girl. Now lift your arms up." Dia said.
Kanon did as she was told, and lifted them into the air. Dia unbuttoned the top of Ruby's pajamas and lifted them over her little sister's head, exposing the girl's beautifully flat chest and modest training bra.
"!? W-what are you doing!?" Kanon stuttered.
"What do you mean? I always dress you like this. Don't tell me you think you're getting to old for your sister to dress you, you're only in your first year of high school! Now come on, step out of your pajama pants and we'll get you in your uniform," Dia said, not wasting another moment.
"Is this... normal?" Kanon asked.
"Of course! All sisters do this with each other. What's with all the weirdness today? Are you catching a cold?" Dia wondered, lowering the pajama pants of her little sister and seeing her smooth legs and kiddie panties.
"I guess... I just don't feel like myself today..." Kanon mumbled under her breath. As she and her new older sister got ready for school, Kanon wondered what was happening, and how she was going to get out of this mess...
--
Honoka woke up as genki as ever. She slept great, had some amazing dreams (that she already forgot), and somehow woke up in the body of some random pretty girl she didn't even know!
But this didn't bother her. Sure, it was weird, but this "Chika Takami" girl was insanely cute, and it looked like she was a fan of μ's! But she was also an idol as well! In some group called "Aqours". Honoka wasn't sure if she had heard that name before.
The girl's obliviousness made her not even realize she was now two years in the future of 2015. Taking everything in stride, Honoka, in this new girl's body, ran to what she thought was her high school. She stopped at the bus stop to catch her breath, and saw someone she might know.
"Heeeey! Morning~!" Honoka called out to the platinum-haired girl. The girl waved back and said good morning as Honoka ran to sit down next to her.
"So what's your name?" Honoka immediately threw out there.
"...? Uhh, Chika, you feeling alright? It's me, You... You Watanabe... your best friend?"
A shocked smile filled Honoka's (or rather Chika's) face.
"You're my best friend!? You're sooo cute! I'm cute too! Have we lived here forever? This island is beautiful! Hey hey, are you a school idol as well? Do you know μ's? Are you a fan of theirs as well, aren't they the best!? How many other members do we have!? When's the bus getting here!? I'm kinda hungry..."
You could only stare back in confusion as her friend Chika rattled on nonsensical questions.
"Chika... you're acting weirder than normal today, and that's really saying something." You wasn't sure what to make of Chika's weird rambling.
Honoka, realizing she was getting a little too excited, tried to dial it back a bit.
"Ahh... s-sorry... I uhh... slept in a funny position last night and had a bit of a light breakfast..." Honoka put her hand on her tummy as it growled.
"Hmm... I see... Well, anyways. It's a busy day for us. We're all meeting up for practice after school, and we have those big tests today in math and science..." You explained to her forgetful friend.
"Tests!? Aww man, I thought this school was gonna be like some tropical paradise..." Honoka whined.
The bus soon pulled up, allowing "Chika" and You to board. They met up with Riko and some other Aqours members on the way to school. Honoka wondered just what was in store for this new dream/reality...