Chapter Text
It was the end of another school day as Matthew watched his students leave and head back to their homes.
Once all the other students were gone Yuzu walked up to Matthew and thankfully she still hasn’t gotten pregnant yet.
Matthew noticed Yuzu was still in her gym clothes as she also had a backpack on “hey Matthew can we go to the villages public bathhouse” Yuzu asked as her backpack was filled with stuff for the bath.
Matthew thought about it as he looked at his younger sister “sure we can go today” he told her.
”Yay” she said happily jumping up and down causing her breasts to start bouncing.
Yuzu grabbed his hand “come on let’s go I’ll even wash your back” Yuzu said as she started running as Matthew followed behind her still holding her hand as he stared at her ass as her shorts hugged it nicely.
Matthew and Yuzu soon reached the bathhouse as Matthew paid for them and even rented a room that family members could use by themselves.
Yuzu smiled and skipped happily to the women’s changing room as Matthew went to the men’s.
Matthew started taking his clothes off and put them in a basket as he then securely wrapped his towel around his waist.
He stepped out of the men’s changing room “Hey Matthew over here” Yuzu said as she stepped out of the women’s changing room.
Matthew turned to look at her but blushed when he saw that Yuzu’s towel was hanging loosely on her body as it barely covered her cleavage as it looked like it could fall off any second.
Matthew noticed some of the other customers stare at Yuzu as some of them had perverted looks on their faces so Matthew quickly grabbed her hand and took her into the room he rented.
”Yuzu you have to be more careful and make sure your towel is properly on” Matthew told her.
”Okay but why we’re in a bathhouse so I’m gonna have to take it off eventually” Yuzu said letting her towel fall exposing her naked body to Matthew.
”Yes but you can’t let strangers see you like that especially other men” He told her as he stared at her body.
”Okay I’ll try to remember that” she said as she grabbed his hand and walked over to the shower heads as they needed to wash themselves before getting into the water.
Yuzu sat down on a stool as she rinsed her hair and added soap before washing it off as Matthew did the same.
Yuzu smiled and stood up and got behind Matthew “I did say I would wash your back” she said as she quickly started washing her brothers back.
Matthew let her as he thought about how the other men looked at Yuzu earlier as other men have looked at her like that before and eventually kids her own age will start to do the same and he was worried that one day Yuzu will lose interest in him and want to have sex with someone else.
Yuzu finished washing his back as she ran in front of him and smiled “hey Matthew want to have sex” Yuzu asked as she stepped closer pressing her breasts against him.
”Not right now” Matthew said worried someone would hear them.
”What you don’t want to even though your penis is like this” Yuzu said as she grabbed his erect cock and started stroking him.
Matthew let out a moan “how about I finger you instead” he suggested.
”Okay” Yuzu said letting go of his cock as she sat on his lap as her pussy was close to his cock.
Matthew rubbed his fingers against her pussy before sticking one of his fingers in while his other hand grabbed her breasts as Yuzu let out a moan.
“Yuzu you have to be quiet” he told her.
“Sorry I’ll try to stay quiet” she said still moaning.
He kept fingering her and rubbed and squeezed her breasts as he leaned in and kissed her as Yuzu happily kissed back as they both quickly added their tongues to the kiss.
While they kissed Matthew added a second finger inside her as Yuzu pulled away from the kiss and moaned “yes right there” she said as she was getting close to cumming.
Matthew started fingering her faster as Yuzu soon started cumming as it got on his fingers and on the floor.
Yuzu panted and got off his lap as she sat on the floor.
Matthew started thinking of when Yuzu might lose interest in him and start having sex with other people “no I won’t let that happen I can do more to make her feel good in a way only I can” he thought as he lifted Yuzu up surprising her a bit.
“Yuzu I changed my mind I’ll make you feel good with this now” Matthew said as he put her on his lap and rubbed his cock against her pussy.
Yuzu let out a moan “okay” she said.
Matthew quickly slid his cock into her pussy and started thrusting fast and hard as they both moaned.
”Matthew what’s the matter you’re so intense today but just a little more” Yuzu said while moaning.
“What’s you want more okay” Matthew said as he went even faster and harder.
”Just a little” Yuzu said as she started moaning louder.
Matthew kept thrusting into her as he soon started to feel himself getting close “I feel like I’m about to cum already” he thought.
“I’m cumming” he said as he soon came inside Yuzu’s pussy.
They both panted “I’m sorry I came already” he said to her.
”It’s okay it felt good but I hope you’ll always be so nice to me” Yuzu said as she turned and smiled at her brother.
Matthew looked at her with a bit of a surprised look on his face as he thought about the other times they had sex as before he focused on making Yuzu feel good but this time he was focused on proving he was the best for her.
“I’m the worst” he thought as his expression saddened a bit.
”Yuzu I’m sorry” Matthew told her as Yuzu looked at him confused not sure why he was saying sorry.
The two of them enjoyed the rest of their time in the bathhouse after cleaning up the mess they made as they relaxed in the water.
A few days later Matthew and Yuzu went to the city to meet their parents but since they were going to meet them in the afternoon Matthew decided to show her around the city first.
“I got on a taxi for the first time” Yuzu said smiling happily as she was enjoying her time at the city as she even wore a special new outfit she picked which was a short sleeved hoodie and skirt.
The first place Matthew took her was the shopping district as she’s been wanting to go there for a long time.
”Shopping then lunch at Mosdo I feel like I’m an adult” Yuzu said smiling.
Matthew couldn’t help but laugh quietly at what she said “this is more of an adult thing than sex to her” he thought.
Matthew soon felt a few drops of rain as he looked up at the sky as it soon started raining.
“Matthew it started raining all of a sudden” Yuzu said.
”Yuzu there let’s go over there” Matthew said pointing to a spot where under a building where they could get out of the rain as they quickly ran over there as Yuzu held her small shopping bag close to her.
“The weather forecast didn’t say it was going to rain and are you alright Yuzu” Matthew asked.
“I’m fine but the rain was a surprise and now my clothes are sticky and uncomfortable” Yuzu said as she lifted her hoodie up a bit showing she wasn’t wearing a shirt or bra underneath and people could see the bottom of her breasts.
“Yuzu stop” Matthew told her before she took it off.
”Why” she asked.
”This isn’t the village” Matthew told her as he soon saw a few guys looking at Yuzu.
”Not good Yuzu is attracting attention” Matthew thought as he looked around.
“Yuzu over here” Matthew said as he grabbed her wrist and quickly walked away with her.
“Yuzu’s defenselessness is dangerous in the city and I have to hide her from other’s peoples eyes” Matthew thought as he kept looking around.
”There” Matthew thought as he saw a bathhouse.
They ran inside as he paid for the both him and Yuzu as they then went to the men and women’s locker room to change out of their wet clothes and put them somewhere to dry.
Matthew decided to use one of the sauna’s and luckily for him it was empty and it felt very nice “the clothes are drying and Yuzu is probably in the women’s bath what a relief” Matthew said as he relaxed.
”Ah Matthew there you are I was looking everywhere” Yuzu said as she stood in the doorway to the sauna with her towel loosely hanging around her body.
”Yuzu I thought you went to the women’s bath” he asked.
”I wanted to be with you but it’s weird the other customers are looking at me so much” Yuzu said as a male customer walked by and looked at Yuzu’s cleavage.
Matthew quickly pulled Yuzu into the sauna and closed and locked the door before sitting back down.
Yuzu’s towel fell off her body as she smiled and sat down next to her brother “this is the first time I’ve been in a sauna and it’s so hot” Yuzu said.
Yuzu looked over at the wall and looked at what the temperature was “it’s 90 degrees are we going to be okay” she asked.
”Yeah it’s fine air is less conductive than water at about 1/20th or so, so even in a dry sauna it’s okay for it to get hot” Matthew told her.
“As expected of a school teacher I’m learning” Yuzu said smiling but Matthew could tell she wasn’t really getting it.
Yuzu soon grabbed his arm and pulled it closer wrapping her arms around it as his arm was against her breast and his hand was on her thigh close to her pussy.
“Yuzu’s soft naked body is pressing against my arm but I can’t think about it” Matthew thought cause if they started having sex someone could hear them.
“Matthew is your penis swelling up” Yuzu asked with hearts in her eyes as she saw a bulge forming under his towel as she pressed her finger against it.
“H-hey don’t touch it” Matthew said as he tried not to moan.
“It’s getting bigger and bigger interesting” Yuzu said as she started to take off his towel.
“Stop we can’t do that here” Matthew told her.
“Your saying you don’t want to have sex but your penis says it wants too” Yuzu said as she got his towel off of him as she could now see his erect cock.
“N-no what I mean is” Matthew started saying.
“Oh it’s a little dirty I’ll lick it clean” Yuzu said as she quickly grabbed it and started licking the tip as Matthew started to moan.
Yuzu kept licking it as she licked up any precum that came out “your juice is amazing” she said.
”it feels good right and your always so sensitive here so I’ll do some more” Yuzu said as she started sucking on the tip.
Yuzu quickly started moved all the way down to the base of his cock and started bobbing her head as Matthew kept moaning as his moans got louder.
Eventually Yuzu pulled away “your dick is so big and lumpy and I love it” Yuzu said.
Yuzu quickly started to climb onto Matthew’s lap “Yuzu” Matthew said as he watched her.
”Hey Matthew want to rub it like this and cum outside or do you want to fuck my pussy and cum inside which one do you want to do” Yuzu asked seductively as she rubbed her pussy against his cock.
“Obviously this one” Matthew said as he grabbed her by her rear and forced her down onto his cock as Yuzu smiled and started moaning.
Matthew quickly came inside of her “I decided to do it inside Yuzu” he said to her as they started kissing.
“That’s right” Yuzu said as they kept kissing.
”I want to cum inside you more is that okay Yuzu” he asked as he deepened the kiss.
”Yeah fill me up” Yuzu said pulling away from the kiss as a string of saliva connected their lips.
Matthew quickly started thrusting as Yuzu matched his thrusts and bounced up and down on his cock “more go deeper” Yuzu said while moaning.
”alright” Matthew said as he pulled out and made both of them stand up.
”Yuzu put your hands on the wall” Matthew told her.
”Okay” Yuzu said smiling as she listened to him as she put her hands against the wall and pressed her body against the wooden walls of the sauna.
Matthew quickly thrusted into her as Yuzu started moaning as he looked at her face while she made erotic expressions while moaning “I don’t want any other person to see your erotic expressions” he thought while thrusting.
“There it feels so good” Yuzu said while moaning.
“Does it feel good here Yuzu” Matthew asked as he thrusted faster and harder.
”Yeah there it feels good more, more” Yuzu said while moaning.
Matthew sped up his thrusts even more “Matthew it’s amazing this is amazing” Yuzu said moaning louder.
”Cumming I’m cumming” Yuzu said.
Yuzu soon came around his cock “Yuzu’s pussy is gripping so tight that my sperm is being squeezed out” Matthew thought as he soon came inside of her.
After they both finished cumming Matthew pulled out as Yuzu lied down on the wooden bench in the sauna as cum leaked out of her pussy.
“Yuzu are you satisfied” Matthew asked while panting.
“Yeah all finished” Yuzu said panting.
After resting for a bit Matthew put his towel back on as he left the sauna closing the door behind him as he quickly came back with cold drinks for both of them.
Yuzu sat up and smiled and grabbed the drink as Matthew took off his towel as they sat next to each other naked.
“So I wonder why a dick isn’t satisfied unless it gets sperm inside know what I mean” Yuzu said as she took a sip of her drink.
”Men don’t really understand it either” Matthew said smiling at her.
”By the way Yuzu I don’t want you to have sex with other people” Matthew told her.
”Why” Yuzu asked.
“Well um” Matthew said as he started thinking of a good way to explain that he just wants her to himself.
”Okay if you say so I won’t have sex with anyone but you but I wasn’t planning on doing it with anyone else” Yuzu said smiling.
“Really” Matthew said smiling.
”Yeah but I want something too” Yuzu said.
”What do you want” Matthew asked.
“I want to do it with you even more and I want us to do it at least 5 times a day” Yuzu told him.
Matthew smiled as it seems he’s underestimated her sex drive “okay I’m not sure if I can do it 5 times a day but I’ll definitely try” he said.
”Yay” Yuzu said as she happily hugged her brother as he smiled and hugged her back.
They stayed in the sauna for a while before Matthew stood up “well I think our clothes are dry by now and come on we don’t want to be late meeting mom and dad” Matthew told her standing up as he put his towel on.
”I can’t wait to see them again” Yuzu said excitedly.
Matthew put her towel on her as he made sure it was securely wrapped around her body “remember you can’t tell them we’ve been having sex they won’t understand” he told her.
”I know and my lips are sealed” Yuzu said smiling.
Matthew smiled back as they left the sauna and went to the locker rooms to change back into their clothes and after they left the bathhouse they met up with their parents as they caught up and had a nice dinner at a restaurant.
Once it had gotten late Matthew and Yuzu waved by to their parents as they started heading back to their home in the countryside where they would definitely have a lot more amazing sex.