But an unforeseen situation occurred.
Big sister angrily told me that Mitsuru-san’s thing was on my underwear.
（He did that……with my underwear!）
I was very embarrassed, trying to remember which pair I was wearing. It wasn’t dirty, right? I had various thoughts like that but she wouldn’t allow me to look at the crucial pair of panties.
Honestly, I just wanted to see Mitsuru-san’s thing on there……
Sister said that apparently, he had mistaken my underwear for her’s. The way she spoke at that time,
「He wasn’t excited by a child like you. He was thinking about an adult like me」
for some reason sounded like she was flaunting and I felt oddly irritated.
I know for sure that that day, I put my underwear at the very bottom of the laundry bag.
When I saw my sister’s underwear randomly thrown in the pile of clothes, I realized that if Mitsuru-san were to see my panties it would be embarrassing…So I hid them at the bottom. Then that meant that Mitsuru-san intentionally avoided big sister’s panties and used mine for that.
That’s why there’s no way he mistook them for my sister’s. He knew that underwear was mine.
While I did feel embarrassed that he did such a thing with my underwear, I didn’t hate it. The boys in my class were saying that it’s bad if guys don’t release it every day and when sometimes they can see underwear through a crevice in skirts they become extremely happy.
I think boys are just like that.
They are interested in girls’ panties.
I’m sure Mitsuru-san was feeling excited after seeing me in that state. Thinking about that, I had mixed feelings. I was happy but also embarrassed.
Could that be a message from Mitsuru-san? Such thoughts also filled my mind.
Mitsuru-san who saw me masturbating, masturbated with my underwear!
「Don’t worry, we’re the same」
Isn’t he trying to send me such a message?
I started having convenient thoughts like that.
The next day, as expected, I was too embarrassed to look at Mitsuru-san…While that continued, before I knew it, Umi became close to him.
「Onii… Saying that Umi stuck to Mitsuru-san.
It seems like she also often goes to his room to play and honestly, the feeling of having Umi surpass me is frustrating. But Mitsuru-san sees Umi as a little sister. I’m sure he thinks of me as a girl.
Otherwise he wouldn’t do that with my panties.
That’s what I thought.
The room next to mine is Umi’s and the one at the end Is Mitsuru-san’s. At first, I didn’t want him to hear sounds from my room so I left the room next to his to Umi. But now I can’t help being curious of what they’re talking about…I think I made a mistake!
However, today, a very good thing happened.
To tell the truth, this morning I wanted to say that I wanted to go to the sea as well but in the end, I couldn’t. I couldn’t talk to him today either…Just when I was thinking that he came to help me study. When I was having trouble, he came to help me.
Honestly, I was quite surprised. Mitsuru-san easily went through and solved the math questions and he told that he goes to a school on the same level as that school for smart kids.
He’s kind, cool and even smart, how can he be so perfect?
But then, Umi interfered and monopolized Mitsuru-san…
（This is so annoying……I also want to be spoiled like Umi）
Honestly, I take my hat off to my little sister’s personality. I can clearly see she got a hold of his heart and is acting spoiled.
（I wonder if he’ll take me to the sea as well～）
While I was thinking like that, it was dinner time already!
Umi had already gotten back, having bought her swimming suit.
Us three sisters eat without Mitsuru-san. Today Kaito-san isn’t here either as he left on a business trip.
Sometime after finishing our meal, big sister suddenly spoke to Umi, who just came out of the bath.
「Umi, later, show me the swimming suit you bought today」
「Ee～? Why? It has nothing to do with you, does it?」
「There’s no way it’s unrelated to me？！」
It’s the usual argument between elder and younger sisters.
「Since it’s the swimsuit that Onii bought for me I think it’s quite strange for Onee to comment on it」
（Right. In that regard, I agree with Umi）
「What are you saying！I hope you bought a proper swimmsuit」
「Yes, he bought a very cute bikini for me」
（No way？ Somehow, this makes me really envious…I also want a bikini）
「Bi, bikini？？？ Even though you’re just an elementary schooler! It’s 10 years too early for you to wear such a thing！！！」
「What are you talking about？ It’s quite normal for elementary schoolers these days. Are you ok？ Onee……」
「There’s no way that’s true！！ Since you are in elementary school, why didn’t you buy something more appropriate like a onepiece？？！」
「Haa？ Onee…Are you from the Showa period？ That’s impossible」
「What？！！！！」
（It began…The usual battle. But today I also have something to say）
「I want a bikini as well」
「「 Eh？？？ 」」
My sisters looked at me with surprised expressions.
「I…I also want a swimmsuit！」
「Iyaiya、Nami-nee…Onii bought it for me so that we can go on a trip to the sea. You aren’t coming with us, are you？」
「I want to go tooっ！I want to go to the sea tooっ！！！！It’s not fair if it’s only Umiっ！」
「Even if you say that…Onii made the plan for me. He didn’t invite you」
「W, well yes…」
That’s where Sae opened her mouth.
「That will be a problem. On top of that, I think that it’s unfair for Umi to go on her own. Very unfair. So let us put a stop to this trip, okay?」
「Waitっ！ What are you saying？？ Are you stupid？？？ Why are you interfering with the plans Onii made？」
「Who are you calling stupid！！！」said Sae。
「I’ll also try asking Mitsuru-san！I’ll ask him if he’ll take me with you」
At my words, the two were extremely surprised and objected.
「Apsolutly noっ！！！We were supposed to go, just the two of us！ It’s no good if it’s with Nami-nee！」
「Even you？ I won’t allow you to go with Mitsuru-kun！」
「Why？ Why is it wrong if I go？？？ I also want a new swimsuit. I also want to go to the sea！！！」
Why is Umi fine, but no good if it’s me…
Why didn’t Mitsuru-san invite me??
Thinking about that tears started flowing down my eyes.
『*Door opens*』
At that moment, the living room door opened and there stood Mitsuru-san.
「I’m back…」
Mitsuru-san entered looking very apologetic.
◇ ◇ ◇
「Sooo…Are you having a family gathering？」
No matter how you looked at it, they were right in the middle of a sisterly fight, but for now, I just said something innocuous.
Sae-san was glaring at me with a furious expression.
「Hey, hear me out！Onii！」
Saying that Umi came to me and said that Sae-san was no longer allowing her to go to the sea.
「Eh？ How can you say that at this point？？」
「Yes, tell my stupid sister！！」
「Even though you just gave us the OK this morning…What happened?？？」
「It’s because Nami said it’s unfair for only Umi to go」 said Sae.
「Eh？ My fault？ I just said I want to go together with them？ Don’t make this my fault as if I’m opposed to it！」said Nami.
「Why do I have to go with Nami-nee！！ Me and Onii will go just the two of us！！」said Umi
（I see…So this became a three-way fight）
「Just that？ Then just come with us Nami-chan. That should settle it, right?」
「Whaっ？ Wait for a second！ It’s obvious there’s a problem！！」said Sae.
Nami-chan looked happy and her face lit up.
「What are you saying？！！ Onii！！」said Umi。
（Iyaiya、This is a real bother…）
「First, Umi！ If it’s between not going or going with Nami-chan which is it？」
「Ee～！ Why~ But I wanted to go on a trip just by ourselves…」
「I understand what you’re saying but if you were to compromise which is it？」
「I want to go to the sea of course！」
「Then it’s decided」
「Next, Nami-chan, You want to go with us right？」
「Y, yesっ！ I want to go too！」
「Understoodっand last…」
Then I saw Sae-san. Making such an angry face, her beauty is wasted.
「With this there are no more problems right？」
「It’s full of problems！ You bought Umi a bikini？？」
「Hee？ I promised Umi I’d get her a swimsuit she likes…You heard that, didn’t you？」
「You just forced her to get it, didn’t you？？」
（Iya、The one I forced her to have is an even more amazing one. Though it’s true I did forcibly make her get it）
「Haa？ So the problem is the bikini？」
「That’s right！！！」
「Is Sae-san’s swimsuit a onepiece？」
「……」
「It can’t be that even though when you go play with my dad you wear a bikini but you won’t allow Umi-chan to wear one？ You couldn’t possibly be saying such a selfish thing？」
「U, Umi is still just an elementary schooler！」
「Eh？ Elementary schoolers wear bikinis all the time…Are you really only 6 years older？Are you actually trying to deceive me about your age？」
「っ！！！！！！ What did you say？？！！！」
（Ahaha, She’s so gullible. This is bad, she’s kind of scary）
「It’s a joke…Aa~ I understand！ If that was so I wish you would have told me sooner」
I looked at Sae-san with a full-face smile
「So basically, you actually wanted to go as well but you weren’t invited, so you’re acting peevish？」
「Whaっ……What are you saying！！ There’s no way that’s the case！」
（Ahaha、So this is what it’s like to add oil to the fire. This is so fun……But her face is really scary）
「Then why are you opposing it？ Both Umi and Nami-chan are going so there’s no unfairness, so there’s no problem, right？」
「Both of them are of age. There’s no way I can let you take them to stay the night away with you！」
「By that logic, all three of us going should decrease the danger, right?」
「……」
（Haaah… Really now… What a bothersome woman… Why would dad ever marry this one? Still, Umi and Nami are cute, so everything’s fine in the end.）
「You just hate me, don’t you？ You can’t stand anything I do so you find some reason or other to stop it. Even this time not letting them go play is just because you don’t like me, isn’t it？」
「Whaっ！」
「Am I wrong？」
「Y, you are！！ I was thinking of them…」
「Yesっ！ That’s it！！ If you’re thinking about them then why aren’t you telling me that you’ll take them and that I shouldn’t butt in?」
「Th, that’s……」
「In the end, it’s because you only think of yourself. Am I wrong？」
「What are you saying to your mother！！！」
「Yes, yes. Can you not bring up this fact only when it’s convenient? Didn’t you say『You aren’t familly』just the other day？ I take responsibility for the words I said」
「……」
「If my dad were to say to Umi『You aren’t family so don’t talk to my son』 what would you think？」
「There’s no way Kaito-san would say something like that！」
「That right, that’s normal……But you told me that countless times. Did you not realize what you were saying？」
「That’s……」
「I’m sorry but can’t you please grow up a bit？」
After I said that much Sae-san broke in tears.
「What I’m thinking…What do you know……I…What do you think I am??……」
（Well then, do I drive her in a corner or do I compromise? What shall I do……）
「I, I’m Kaito-san’s wife！ Why won’t you listen to me！！」
（Corner her it is. This is pissing me off……I’ll make sure to be thorough enough that she won’t act up again. This is too troublesome…To hell with all this!）
「To answer your 1st question, how would I know what you’re thinking！ I don’t want to understand and there’s no way I would！」
「Next, for your 2nd question, what do I think you are？ Let me spell it out for you. I think you are a fox who entered the house, where the memories of my mother are, with muddy feet. A thieving, brazen and unscrupulous woman. But you aren’t satisfied with just making it impossible for me to live in this house. The lowest type of woman,、pretending to be a mother while mistreating your kids. A good for nothing. There’s still more, should I say it？」
As expected, after I said this much, Umi and Nami made an unbelievable face so I would end it here.
「Onii…Isn’t that too much?…」
「Yes, I think so too…」
（Uu…Being told that by the two, my heart throbs）
Sae-san broke out in a loud cry……
Yep, things just got way out of control……
「A, anyways, just take a little more responsibility for your speech and conduct. Also, you should think things from other’s perspective, like, what do you think your sisters would think when they see their older sister opposing them when there is someone to take them to the sea？ Not 「I」, you should think more about what they think.」
（Somehow, I’m saying things a teacher would say）
Just like this, in just a few days this family collapsed.
That night Umi didn’t come to my place so as to console her older sister……