Kakkoii Onnanoko to 12-centi no Yakusoku - Ch. 50 - I keep remembering

[Kagimizu]

Wait, why is this supposed to be sad? I thought they had already established with each other that it's not romantic and that he had a crush on someone else and that they were just friends?

Feelings don't just go away overnight. And being told by someone you're in love with that they're now dating someone else has an entirely different sort of finality to it than just being told "no." Having any lingering (realistic) hope of "something" happening snuffed out once and for all... yeah. Yeah...

 

[Apep23]

I don’t care what anyone says, akari is the best character in the series and I will die on that hill

 

[Hicleric]

Kinda nice to be on the same squee as the MCs for once

 

[ThatGuyScifi]

Honestly been on my mind since chapter one lol

The art is subtle about it but I do enjoy the little detail of how as their relationship progresses she gets more "girly" at times and he goes from soft boy to looking fairly buff. These last few chapters are especially strong with that.

 

[Kaito57]

The art is subtle about it but I do enjoy the little detail of how as their relationship progresses she gets more "girly" at times and he goes from soft boy to looking fairly buff. These last few chapters are especially strong with that.

Damn... now that you mention it...

 

[Graywing]

4mins?! He's a spy!! Thanks for the chapter!!!

 

[ShadowSilence]

Lets hope this doesn't end up like green yuri and actually has some meaningful stuff after this arc

 

[nyoron77]

Reminder...original plan it's to introduce at least another girl char ...

Which the girl who love with that another guy while she alrdy have bf ...

And likely that guy will ask tomo to pretend as his gf so she can drag the story at least until 20-30 chapter more ...

And Thanx to poor sales ...the idea likely being postpone to another arc if this series can still continue long and force storyline to make both tomo and ibuki become couple

 

[wallsg]

Clearly you are not normal ... healthy adult can hold breath for 3-5 min

And certain group of sea people can hold breath and being underwater for over 10 min

4 minutes?! Wtf kind of monster is he?!

@Friendly-Sentence710

The most common cause of any argument that would start here is average (normal) vs maximum (can). The second response addresses that.

ChatGPT blendered the data and says:

how long can the average person hold their breath underwater?

Spoiler: Response

For most people, the average breath-hold underwater is about 30 seconds to 1 minute.


Here’s a quick breakdown:

• Untrained adults:
  Typically 25–45 seconds is common before the urge to breathe becomes strong.
• People who practice occasionally (but not formally trained):
  Often 1–2 minutes.
• Trained freedivers:
  Can routinely hold their breath 3–5 minutes, and elite freedivers can exceed 8+ minutes using special techniques.

If you want, I can explain what factors affect breath-holding time or how to safely improve it.

are you sure it's not longer for untrained and for the occasionally practiced?

Spoiler: Response

Yes — the ranges I gave are the commonly cited typical medians, but there’s some nuance. Many people can hold their breath longer than that, even without formal training, but the average is shorter.


Here’s a clearer breakdown based on available studies and safety-testing data:

Untrained adults​

• Most fall between 30–60 seconds.
• Some can reach 1–1.5 minutes, but that’s above average, not typical.
• Truly untrained people rarely exceed 90 seconds without intentionally trying to push themselves.

People who casually practice (but not formal freedivers)​

• Comfortable range is more like 1–2 minutes.
• With a bit of intentional practice (relaxation, slow breathing beforehand), many can do 2+ minutes.
• Going past 3 minutes usually requires specific breath-up techniques and some understanding of the body’s CO₂ response.

Why people think the average is longer​

• Videos of people doing 2–3 minutes make it look common, but those individuals are usually:
  • Relaxed
  • Preparing beforehand
  • Not truly “untrained”
  • Filming only their best attempt

Bottom line​

• Average ≠ maximum
  Many people can push past the 1–2 minute mark with even small amounts of technique, but the average person, spontaneously, sits closer to 30–60 seconds.

If you want, I can walk you through a safe test or explain why breath-holding varies so much between people.

 

[wallsg]

The art is subtle about it but I do enjoy the little detail of how as their relationship progresses she gets more "girly" at times and he goes from soft boy to looking fairly buff. These last few chapters are especially strong with that.

IKR? This ain't Tomoaki...

 

[MisterMango]

He just dies in the tub, series over

 

[nbcfan]

"Hey Tomo! I know you have something you want to say, but let me go first. I know you have someone else you like, but listen, I have a solution. Have you heard of 'Mormonism' and the writings of Brigham Young?"



Poor Akari.... not like this. Not like this. Our fluffy ray of sunshine doesn't deserve to go out like this



He is ready for his first time at 3rd base with Ibuki. The question is if Ibuki is ready.

Serious post:
There are three main components to breath control, one of them is mental and mental is hardest part. Even without special training the average person can last about 5 minutes without gas exchange at rest, but your brain makes you want to breathe. When you can't you start to panic, your heart rate excelerates and your brain, your #1 energey suck, goes into highgear or (if underwater) you will inhale water an then the whole thing goes sideways.
So the #1 main thing is learning and teaching yourself not to panic when you can't inhale and exhale. This is why pearl & sponge divers can stay down, making physical efforts for 10 minutes or more on a dive.

The other thing to remember, as we get into the physiological side of things, is that what makes you need to breathe is less about bringing in oxygen and more about exhaling carbon dioxide. If you could scrub the CO2, you could last (iirc, i might be off) for over 30 minutes on just the oxygen in the air in your lungs. This part of the concept of scuba rebreathers.
CO2 binds to hemoglobin, the iron in your blood that carries oxygen, degrading its effectiveness until it is expelled. Carbon MONOxide is even more likely to bind to hemoglobin and is very hard for your body to scrub, which is why suicide via carbob monoxide poisoning works even in oxygen rich enviroment.

So what these people who go for long periods of time do is firstly, extended period of times in low-oxygen environments increases the density of hemoglobin. This means your bloodcells are able to pick up more oxygen, and carry more CO2 without the ability to move oxygen degrading to critical levels.

The second part is, remember how I said its not about breathing IN oxygen but OUT CO2? The other trick is to slowly breath out as you hold your breath don't inhale. this will remove CO2 that your bloodcells are dumping into your lungs, allowing you survive for longer.

Anyway, back to horny posting.

Thank you for the science lesson.