Sorry for the inconsistent updates. I have exams coming up (which I still haven't reviewed for) and school requirements. Also, money's tight XD. Man, I need to get paid soon hahahaha.

"Hey, wake up. Come on, it's late already. How long are you going to sleep for?" Fuutarou felt someone shaking him on his side.

"Yotsuba! Wake up already! And get away from Fuutarou-kun." Fuutarou was now being lifted. He really couldn't see anything as someone's chest was pressed firmly on his eyes.

"You! Stop hugging!" Another set of arms were trying to separate them.

"Alright, alright! I'm getting up!" Fuutarou and Yotsuba told them off.

The nap did wonders for Fuutarou. He had more energy than ever, and felt light as a feather. He felt like he could tutor the sisters for another twelve hours. However being suddenly woken up left him a bit irritated. His chest felt a bit heavy. Yotsuba on the other hand felt refreshed as well, and felt like she can study for a long time. Naps really do help people grow.

"Now, care to explain why you two were sleeping together?"

"Sorry, I felt the urge, and since we were on a break I figured why not." Fuutarou must have not fully woken up yet. He might have leaned on his ears too much during the nap.

"Uh-huh? And care to explain why you decided to sleep next to each other?" Nino held up her spatula as she crossed her arms.

"What do you mean? No one was beside me when I fell asleep." Fuutarou did wonder just why Yotsuba decided to sleep next to him. She was even hugging him to boot. Maybe she just wanted a pillow? Who knows, the kotatsu is a very tempting piece of furniture.

"I seem to recall you blitzing around the room before deciding to sleep. By then Fuutarou was already in place." Miku added.

"Oi, oi. Did I really do something that bad?" Suddenly referring to him in third person meant Miku must have been pissed.

"Yotsuba. Since when have you been so forward?" Itsuki wondered.

"Ah? I'm sorry. It won't happen again." Yotsuba opened her eyes. Apparently she still wanted to sleep.

"And you! Care to explain the hugging?" Nino pointed at her with the spatula.

"Eheheh. Sorry, it was just so soft I couldn't help it." Yotsuba laughed it off.

The Nakano sisters looked mortified. Ichika's eyes were dull. Nino's eyes were flaming. Miku's eyes had swirls on them. Itsuki was about to cry. "You pervert! How dare you do that to our sister!"

"Sister?" Fuutarou was heard his voice, though his mouth wasn't even opening. More importantly, he got a good look at his surroundings and saw Itsuki grabbing... him?! "Aaaahhh!" Fuutarou looked around, and realized why everything seemed so unfamiliar. He was looking at the sisters eye to eye, no longer needing to look down. Speaking of looking down, he tried looking to the ground, but couldn't. Two massive mounds were blocking his feet from view.

"Ahhhh!" Yotsuba tried to look at her "pillow". Or was it a mirror? She saw herself, moving and screaming and panicking, but she was not the one doing them. She felt taller and heavier, and was looking down at the sisters in order to talk to them.

Yotsuba and Fuutarou grabbed each other's shoulders. "You're me!"

"So let me get this straight. The both of you are each other?" Ichika was surprised such a scenario was happening. Being an actress, she should have been used to unusual dramatic events, but the real thing still felt so foreign to her.

"Yotsuba is Fuu-kun and Fuu-kun is Yotsuba?" Nino set down the dish she had been cooking. A stack of pancakes laid in front of everyone, but no one had any appetite. Well, except Itsuki.

"How did this even happen?" Miku tried searching on her phone. Body swapping seemed like something pulled out of a manga. The first entry explained it to be witchcraft or something.

"I wish I was dreaming. Am I dreaming? Someone tell me I'm dreaming..." Fuutarou looked hopeless. "Oi, Yotsuba, do you have any idea how this happened?"

Yotsuba kept her head down. She was shaking.

"Hey, cheer up. We're going to fix this, don't cry about it." Fuutarou tried to console her.

Yotsuba shook her head and looked at them with tears forming. "Uuuhnn, it's not that." She pointed to the bathroom.

"You have got to be kidding me." Fuutarou couldn't believe the situation they were in. "Okay, uhm, just do it as you normally do. I don't mind anymore."

Yotsuba quickly rushed to the toilet. After she closed the door, everyone heard her scream. "Uesugi-san! How do I use this thing?!"

Fuutarou bolted to the front of the door. "As I said, just do what you normally do." He tried to help her from outside.

"It won't fit! The toilet's really cold!" Fuutarou's voice never expressed that much panic and suffering before.

"What did I do to deserve this?" Yotsuba's voice on the other hand never sounded so negative.

"What are you standing around there for? Go in and help her!" Nino didn't want anyone else to see Fuutarou naked, but she couldn't let Yotsuba just suffer like that. A crying Fuutarou would have been an awful sight.

"But I can't just go inside a bathroom when a girl is in it!" Fuutarou tried to reason with them.

"There's no girl in there! Just go in and help her! It's your body, you're the one who knows how it works!" Nino yelled at him. "Yotsuba never locks, so just get in there!"

Fuutarou went ahead and saw Yotsuba doing her best to hold it in. She couldn't position herself in a comfortable position, so Fuutarou pulled her back first. "Just stand in front and aim."

"But I can't see it."

"You're in my body, remember? I can see the floor just fine. Here." Yotsuba's hand assisted Fuutarou's hand in grabbing it. Fuutarou also helped her adjust it. "Now just pee and get it over with..."

After Yotsuba finished, she felt like a child that just wet her pants. She didn't wet anything, but the fact that she was being potty trained all over again was not a good experience. "Uesugi-san, I'm sorryyyyy!" Yotsuba was about to cry before Fuutarou grabbed her.

"Don't worry about it. I'm sure we'll find a way to get back." Fuutarou washed his hands and left. Yotsuba wanted to wipe, but didn't know how to. After washing her hands, she found Fuutarou surrounded by her sisters.

"Never speak of this again. This never happened." Nino's eyes signaled she was ready to do some very dark things.

"What about having Dad take a look at them?" Itsuki suggested.

"I don't think he will appreciate it when we tell him that a Fuutarou-kun is inside Yotsuba and we can't get him out." Ichika leaned her head on her hand.

"He'll kill me if you word it like that!" Fuutarou screamed.

"Still, Ichika has a point. Dad is a man of science, and this is something way beyond science." Miku reasoned out.

"In other words, he'll kill you if he finds out." Nino bluntly explained.

"Wait, so what happens tonight?" Itsuki asked.

Everyone gasped. "What do you mean by that?" Fuutarou asked her.

"I mean how do you explain this to your family? Won't they freak out as well?"

"I guess you're right. Yotsuba, what do you want to do?" Fuutarou decided to ask her opinion.

"I get to have a sleepover with Raiha-chan? Yes please!" Yotsuba looked fine with it. She was even excited, so Fuutarou couldn't complain.

"I guess that's that. Let's eat before you go out, Yotsuba." Nino suggested.

They ate an early dinner so that it wouldn't be too late when Yotsuba headed for Fuutarou's home. They all decided to rest that night, moving up study time to the next day. They were all too tired to think. As Fuutarou was preparing to go to bed, he felt nature calling. Ichika was the first to notice.

"Ara, Yotsuba-chan, do you need something?" Ichika decided to tease her little sister.

"..." Fuutarou turned to his side.

"Come on, don't be shy now." Ichika smiled.

"You have to pee?" Nino finally noticed. "Wear a blindfold, you pervert!" Nino wouldn't let Fuutarou see Yotsuba's body. That meant seeing Nino's body too, and that was reserved until their very own night of passion.

"How am I supposed to see anything then?" Fuutarou protested.

"Not to worry, Onee-san will help you." Ichika stood up to guide him.

"That's what worries me the most." Fuutarou thought to himself.

Fuutarou wore a blindfold the whole time. Ichika sat him down on the toilet and wiped him afterwards too. While Fuutarou was washing his hands Ichika turned his face in her direction. "What are you?"

"Seeing as we're here, why don't I brush your teeth?" Ichika offered.

"I can brush my teeth myself!" Fuutarou defensively claimed. Who knows what Ichika can do if she was that close.

"Are you sure about that? You don't even know where her toothbrush is." Fuutarou looked at five identical toothbrushes. They were not making things easy for him. "If you let Onee-san take care of you I promise I won't tease you any more tonight."

Fuutarou decided this much was worth it in exchange for a peaceful night of rest. "Fine, just this once."

It wasn't worth it. Between Ichika's merciless assault to the helpless feeling he had from being on eye level with her, Fuutarou couldn't do anything. Ichika proceeded to flood his mouth with sticky white toothpaste that had a very mature taste, repeatedly stroking his cheeks, tongue, and almost pushing down his throat in order to get to every nook and cranny. She did this multiple times under the excuse of "Onee-san has to be thorough. No need to swallow, just swirl it around then spit it out, then we can go for another round.". Fuutarou had never felt so violated in his life. Was this what the younger Nakano sisters experienced every night?

Fuutarou entered Yotsuba's room and looked around. On her desk was a plastic frame with a very familiar picture, the one Rena took. But the picture didn't have the crease from staying in his handbook.

"So my first love and second love is the same person?" He smiled at himself. "You're being really unfair, Yotsuba." He decided to crash for the night.

Unfortunately, another Nakano appeared five minutes into his slumber. Miku opened the door and quietly laid herself beside her sister.

"Uhm, what are you doing?" Fuutarou already wanted to sleep.

"Don't mind me. I'm just here to bond with my sister."

Fuutarou was too tired to start something, so he just let it slide. Miku looked content and happy to sleep with him, so it wouldn't hurt anyone to just let her do what she wants. He fell asleep, once again being used as a pillow. A girl's body was unbelievably soft, and Miku was glad to share hers.

"Mhmm... Good night, Fuutarou..."

Meanwhile, in the Uesugi residence, Yotsuba had just finished playing with Raiha and was now cuddling with her to sleep. Her sweet "Onii-chans" made Yotsuba adore her more and more. As she held onto Raiha and savored her warmth, she pondered to herself "Raiha-chan... Isanari-san... I want you all to be happy...". With that, Yotsuba gently hugged Raiha and fell asleep.

"Yotsuba-san... Zzzz..."

The next day at school, "Yotsuba" aced all of her exams. On the other hand, "Fuutarou" was suddenly doing very well in gym class.

"What's gotten into them?"

"It's like they switched personalities or something."

"Fuutarou-kun suddenly looks very handsome."

"I wish Yotsuba-san would teach me."

"We lucked out on our class reps."

They all went back to the Nakano apartment together. They were surprised to see both Raiha and Isanari standing in front of the building.

"Alright, spill it. You're not our Fuutarou, are you?" Isanari gestured to his son. Yotsuba couldn't properly respond.

"Why don't we all head up first? WE'll explain what happened there." Ichika helped her sister.

After explaining what they currently knew of the situation, Isanari's seriousness faded. "So basically, Yotsuba-chan and Fuutarou have switched bodies... Haahhh, I knew Fuutarou was acting weird yesterday. He even played with Raiha."

"At least make an effort to cover it up!" Fuutarou screamed at Yotsuba.

"Ehehe. I'm sowwy." Fuutarou's cheeks were stretched by Yotsuba's hands. "Raiha-chan was so cute, I couldn't help myself."

"As things stand, I can't afford to take Yotsuba-chan into our house. I don't think our house is fit for her body either."

"So what you're saying is..."

"Yep. Maruo would freak out if one of his daughters suddenly started staying in our house." He didn't tell them that when Maruo found out Itsuki stayed over, Maruo's treatment of Isanari grew worse by the day. "Basically, you can't go home until you get your bodies fixed."

"That's okay. He can stay over until we get this mess sorted out." Itsuki gladly told the Uesugis.

"Thank you. I hope we can fix you both soon, I don't even know which one of you is my son."

"Alright Dad." Fuutarou confirmed himself.

"Well, we're going to go now. Take care of yourselves." Isanari stood up to leave.

Raiha hugged both Fuutarou and Yotsuba. "Onii-chan, Yotsuba-san. I love you, please get yourselves fixed soon, okay?" With that, they left the apartment.

After dinner, they held another study session. It was weird that Yotsuba's voice held all this knowledge, but no one could help it. After studying, the Nakano sisters decided to let Yotsuba's body join them for a bath. They helped wash Yotsuba, since he was blindfolded the whole time. Fuutarou, on the other hand, no longer minded that Yotsuba was the one washing his body when she took her bath. Everyone went to their rooms afterward. Fuutarou decided to sleep on the couch this time to let Yotsuba enjoy her room.

Once again Miku came to snuggle under the excuse of sisterly bonding. Fuutarou didn't object, as Miku was the softest pillow he has ever had. Inside Yotsuba's room, however, another situation presented itself. This time, Nino opened the door.

"Nino? What are you doing here?"

"Can't I sleep with my sister once in a while?"

"That's... I'm currently not your sister, you know?"

"You'll always be my sister, Yotsuba. No matter what."

"Oh Nino. I love you too!" Yotsuba grabbed Nino for a hug.

"Ahh. Fuu-kun's smell. I feel so safe. Change bodies right now, you two! Then this will be perfect." Nino silently thought to herself.

"Hey, Yotsuba? Can I do it with you?"

"Do what?"

"You're not currently my sister, right?"

"What are you talking about?"

"And I need the experience..."

"Nino?"

"You know? Kiss? And maybe..." As Nino leaned in, Yotsuba panicked.

"No, Nino, no!" Yotsuba hit the back of Nino's neck out of confusion and fear. It was a move taught to the sisters in case a man decides to assault them, well, a girl in this case.

Nino fell on top of Fuutarou's chest. Yotsuba didn't know what to do, so she just brought Nino back to her own bed, which was easier said than done. She may have done well in gym class, but that was thanks to her effort and not Fuutarou's body. Now she was tired, and bringing Nino back to her room drained Yotsuba. Luckily, Ichika was fast asleep and Miku was sleeping with her body downstairs. She lied on the bed and slept through the rest of the night.

The situation continued for one week. Everyday they tried all sorts of things to try to get Fuutarou and Yotsuba back in their bodies. From trying to chant spells to touching their foreheads together, they both tried everything they can think of.

"Did you really not do anything else?" Nino asked once again.

"Really, I don't think there's anything else!" Fuutarou insisted.

"Hahh, whatever. I'm tired. How about we turn in for the night and try again tomorrow?" Ichika requested for a break. They had been doing this since the afternoon.

"Good call. Nino's breakfasts haven't been as tasty since she was so tired from her efforts to bring them back." Yotsuba just stayed silent from Itsuki's statement. She knew Nino was tired from other things she tried doing throughout the night.

"Hey, Fuutarou-kun. Wanna try sleeping with Yotsuba again? See if that will work?" Ichika suddenly had a fun idea.

"Huh?" Fuutarou wondered what might have been going through Ichika's mind.

"This all happened because you slept together, right?"

"But a man sleeping with a woman is..." Yotsuba realized the meaning behind her words.

"Yotsuba, you wouldn't dare do that to your own body, would you?" Ichika disregarded her statement. Yotsuba knew what being assaulted felt like thanks to this past week, and she for sure wouldn't try to do anything like that.

"But still..." Fuutarou tried to reason with them. Yotsuba's lips were shushed by Nino.

"Don't worry, we'll keep an eye on you." Nino whispered.

"Yotsuba, let's try it. I promise I won't do anything." Fuutarou blushed as he said this.

"Go for it then. This might just do the trick."

Fuutarou locked the room, but made sure to give Nino the keys.

As Fuutarou fell asleep, Yotsuba tried to emulate the exact situation once again. Fuutarou's sleeping face. She knew she could only do this in her wildest dreams, but when Fuutarou was asleep it was possible. She leaned in and made Fuutarou's lips connect with hers. It was short, but passionate, then she fell asleep afterwards.

Fuutarou woke up feeling stronger than before. He felt something soft, and saw Yotsuba's body over his. Could it really be? He checked his pants and saw. "It's there!" He almost cried tears of joy.

Yotsuba awoke from her slumber thanks to Fuutarou's joyful cries. "Uesugi-san! I'm me again!"

"I'm so happy! Who knew sleeping with you did the trick!" Fuutarou hugged Yotsuba out of sheer happiness.

"Ho? So you slept with my daughter, huh? Uesugi, do you know what that means?" A cold voice emanated from the newly opened door. Maruo had apparently gone for a visit since Fuutarou had stayed over the entire week.

"Father?"

"Noooooo!" Fuutarou woke up from his slumber. He was in the Uesugi residence, with Raiha sleeping beside him. "No way. Was it all a dream? I could swear I slept at least seven days in that..." He felt his body, everything was normal as it should be. "Right, things were way too strange for that to be real."

He got up and went to the Nakano apartment. He had to stay over tonight since they had to catch up to a lot of the material. What surprised him the most was that Yotsuba seemed to be ahead of her sisters this time, as if she already knew the topics.

"Hey, Fuu-kun, the couch seems lonely tonight. Want to sleep in one of the rooms instead?" Nino was trying to fish Fuutarou.

"When you first came here you looked like you didn't sleep well. I think Uesugi-kun should try sleeping on a bed for once. How about Yotsuba's? She seems to be doing well, why not reward her?" Yotsuba gulped at Itsuki's statement.

"No way am I sleeping with Yotsuba again!" Fuutarou quickly denied her. Yotsuba's eyes were full of despair when she heard this. Fuutarou saw her and tried to cheer her up. "At least, not until we're both ready..." He blushed at the words coming out of his mouth. Yotsuba instead smiled at his statement.

"Again?" The rest of the Nakano sisters had swirls on their eyes. Yotsuba meanwhile could only hide her happiness behind her notebook.

Just in case you have questions, only the two of them were synced. The rest of the sisters had no idea what happened in their dreams.

This is already my ninth fanfic here. Honestly, the number 9 is special for me. Originally, this story's plot was supposed to be in Isekai'd but I figured I couldn't just dump my most bizarre ideas there just because it's an isekai story. So here we are, and trust me, I've got more. I already have ideas for Ichika and Nino, maybe Miku if hers doesn't evolve into a standalone one. Of course Yotsuba's was first, no questions asked.