Believing She Has Been Reincarnated into a Baseball Game, My Little Sister Is Aiming for the Koshien, While I Give It My All to Keep Her from Finding out That It’s Actually an Ntr Game - Chapter 33

“Are you listening, Onii-san! And you too, Maika-chan!”

Riko had already stood up, her face red with fury as she shouted. I had never seen her this enraged.

“Engagement!? Marriage!? Ah, yes, yes, yes! I get it, it’s fine! I thought it was only a matter of time! I’ll acknowledge it, but I won’t be celebrating!!”

“Riko!? Really, Riko!?”

Without thinking, Maika and I exchanged glances. My wife’s eyes were wide with shock; this development was completely unexpected to her as well.

I never thought Riko would accept it so easily…!

“What’s with those faces, you two! Did you really think that I, at this age, was seriously considering being bound to Onii-san!? Did you think I was that crazy, foolish younger sister!?”

“We thought so. A crazy cat burglar.”

“I don’t want to hear that from you, Maika-chan!”

Really, that’s true.

“I love Onii-san the most in this universe, but I’ve never thought about becoming romantically involved with him! If I can be the most important person to Onii-san, that’s enough for me! That’s!! Enough!! For me! I! Am! Onii-san’s! Number one!! Yes, this is important! Do you understand, Onii-san!!”

“Yes, I understand. That much is certain.”

“Really!? I’m holding you to that, okay!? If you lie, I’ll never forgive you!!”

It seems like she’ll never forgive a lie. Well, it’s definitely not a lie.

Since always, and forever hereafter, Riko and Maika are my most important people.

“Then it’s fine! Marry anyone you want! A marriage is just between strangers after all! Such a connection, from my perspective, is as good as none! It can’t even be called a bond! It’s just a legal relationship! Not family!”

“Is, is that so?”

Her ideology is quite extreme, but well, if she acknowledges the marriage, that should be good enough for now. I don’t want to stir up a hornet’s nest. This sister is scary. Scarily cute.

“Anyway, thank you… Riko.”

“Yeah, um, thanks, Riko.”

Maika also humbly bowed her head. Sincerely cute.

“So, I guess it’s okay if I start sleeping in Kyugo’s room from tonight, right?”

Sneakily cute.

“…Don’t get carried away, foolish wife…”

My sister is saying something scary again. Creating scary terms.

“I’ve been saying! I only acknowledge the marriage!! Anything naughty! I absolutely! Won’t allow!!”

“‘Eh…?’”

“Eh…? What do you mean, ‘eh’!? See, isn’t that it!? Talking about love and marriage, in the end, you two just want to do naughty things, right!? Isn’t it just carnal desire!? Riko has noticed! That’s what those filthy carnal desires! Appear in these two characters! ‘Extra thick!'”

Riko’s mochi-mochi hands then slammed down on the box. The words ‘extra thick’ were squished. But no worries. The contents are undamaged. After all, they’re made of rubber. And they’re extra thick.

“Hey, Kyugo. What’s your sister been saying? I don’t think I can get along with this woman.”

“The stranger should keep quiet. So, you see, Onii-san. The foolish younger sister has been listening from the start. What is this, exactly?”

Riko kept banging her palm on the squished box. It’s okay. It’s mochi-mochi. It’s extra thick.

“Ha. No, that’s why… they’re condoms… prepared for times with Maika…”

“I know what condoms are! Riko has received proper sex education!”

“So, you understand, right? Condoms shouldn’t be shunned, and certainly not something to be interrogated about just for possessing…”

For a moment, the image of a stern black-haired student council president flashed in my mind, but I quickly forgot it. Yeah, condoms are necessary for my future with Maika! Well, actually, they’re meant for collecting sweet juices.

“That’s not what I asked! Why do they need to be so extremely thick!”

“Eh? Eh? You’re asking that?”

“Riko feels it! I sense a very lascivious scent! ‘Extra thick’… feels like a very perverted reason!”

“Ri, Riko, what are you saying…”

“The role of condoms, as contraceptives, is to prevent sperm from entering the vagina! That’s why they are made of rubber! If they’re latex! That alone achieves their purpose! Thickness has nothing to do with it! If they have enough strength not to break! There is absolutely no need for them to be extremely thick! No need to emphasize that in the product!”

“Uh, uhh…”

“Stop it already. I’m going to turn into a Chiikawa. Even without anything being done, I’m already a Chiikawa.”

“In other words! The only reason to seek thickness is if there is a purpose other than contraception! Riko is a logical younger sister!”

She’s incredibly logical and wise.

“Hold on a minute, Riko. What’s so bad about that? You might not know because you’re a child, Riko, but there are many reasons lovers do intimate things. Well, I personally don’t need extra thickness. It doesn’t feel good on the tongue.”

Already a bizarrely wise wife.

“See, I told you! I don’t know why, but there’s something beyond just contraception! Listen, Onii-san. What I want to say is, if we seek functions in contraceptive devices beyond contraception, might we be sacrificing their contraceptive function?”

What have I been accused of all this time?

“Listen to me, Riko…”

“What is it, pervert Onii-san!”

“I have… premature ejaculation.”

“What is premature ejaculation?”

“It means I ejaculate too quickly.”

“I don’t quite understand what you’re saying.”

Just kill me already.

“For example, if I wear a regular-thickness condom and insert my penis into a woman’s vagina, I can’t last long against the stimulation and will ejaculate quickly. Then I won’t be able to satisfy the woman.”

“Riko, you can substitute ‘woman’ with ‘Maika.’ I’m fine even if Kyugo is quick. I’m quick too.”

“Why do you even like someone like her, Onii-san?”

“I love her, including all these aspects. And even if Maika says she’s satisfied, men are creatures who can’t just take that at face value. I want to last a little longer… That’s a man’s pride… If the condom is extra thick, it could act like armor, reducing the stimulation, right?”

“Hmm, but Onii-san, you’re so tough on the mound and in the training room, it’s hard to believe you’re weak to stimulation… I just can’t accept it.”

“That’s because, Riko, my glans is usually covered by foreskin.”

“I am aware of that.”

“Why do you know that?”

“But look, that’s weird! If it’s covered by the foreskin, then there shouldn’t be any need for thickness in the condom! The foreskin should protect it!”

“It’s precisely because it’s usually protected that it’s weak when it really matters!”

“‘…!?’”

My soul’s scream somehow makes the double sisters show a surprised expression. Not a quote-worthy moment. Just an explanation of a common foreskin condition.

“…So, that was the reason…”

Riko nods solemnly, finally understanding through just an explanation of a common foreskin condition.

“So, there’s no risk of sacrificing contraceptive function. The certainty of contraception depends more on uniformity, material, quality control, and most importantly, how the user wears it. Okamoto is reliable, and that’s why I practiced with the nine that disappeared. So, you don’t have to worry about that.”

“Extra thickness, ah, Onii-san…”

“I don’t need condoms or anything. I’m already prepared, both heart and body.”

“Extra thick-san! Look, even if Extra Thick Onii-san is reliable, this woman is like this! In the end, what I want to say is this!”

Then just say that from the beginning. What have I been enduring all this for?

“Onii-san, Maika-chan. Let me be clear about this. I will acknowledge your future marriage, but please abide by this condition no matter what.”

Riko glares at us sternly,

“Intimate acts are forbidden!!” 

“No way!!” 

“Maika!!”

Maika, that’s not right, Maika! This isn’t the moment to reflexively burst out angrily!