Yuki's Heartbeat 2

* This work is fictional, and all persons appearing in it were 18 years of age or older and were filmed with their consent.

Thank you for visiting.
This is the second video of Yuki's heartbeat, 21 years old.
She is a female college student currently attending university, and it was a rare opportunity to hear the heartbeat of such a young and vibrant person, so I took plenty of photos.
She was slender and had large E-cup breasts, but despite her large breasts I was able to clearly hear her heartbeat.
She also has an incredibly cute voice and beautiful long black hair, so much so that I think the term "black-haired, pure girl" was created just for her. I also really loved talking to her, so I had a lot of fun filming with her.
At the request of the person, the face has been blurred in the sample image, but please rest assured that the face is not blurred at all in the video.
In this video, I asked for the following:
- Heartbeat when taking a deep breath
Heartbeat when lying down
- The sound of your heart beating while guessing what's in the box
- Heart sounds when breathing through a bag
- The sound of your heart when you inflate a balloon after exercise
- Heart sounds when compressed after exercise
- The sound of your heart when your nipples are touched
- Heartbeat when an electric massager is applied
- The sound of your heart when you are soaking in a bathtub
The video is 50 minutes and 27 seconds long.

To check the heart rate and oxygen concentration when taking a deep breath, a pulse oximeter was attached to measure the heartbeat in a normal state. The heart rate was about average, but the oxygen concentration was 90, which was slightly lower than the other patients. As the patient took a deep breath, the oxygen concentration decreased even further, dropping to as low as 82. This is a bit worrying. There were also a few points along the way where the numbers were not measured properly and errors were occurring.
The heartbeat speeds up when you inhale, and slows down when you exhale, with the numbers rising and falling accordingly. This clearly shows respiratory sinus arrhythmia, just like the other patients. Yuki also said that she noticed her heartbeat speed changing when she took a deep breath.

Next, we ask you to lie down on the bed and listen to your heartbeat.
Unlike when you are sitting, your heart is beating at a rate of about once per second, which makes you feel quite relaxed.
During the session, we ask you to stretch twice and listen to the changes in your heartbeat.
She took off her swimsuit and was photographed topless, so when she stretched, some of her ribs were visible. I guess it's because Yuki is so slender that we could see them.

In the heartbeat when guessing what's inside the box, we first put a scrubbing brush inside, and then I hope you enjoy the change in the heartbeat as we try to guess what's inside. Yuki said before the shoot that she doesn't usually get so scared, but when we put the stethoscope on her before she puts her hand inside the box, her heartbeat is already a little fast. The heart is honest. When she puts her hand inside the box, we calmly guess what's inside, which is a scrubbing brush, but even then her heartbeat is a little fast.
The second time, we put a toy snake in and listened to the change in the heart sound when we applied it to the patient. It seemed like the heart was beating a little faster here too.

To hear Yuki's heartbeat while breathing through the bag, we attached a pulse oximeter and checked the changes in the readings while placing the bag over her head and sealing it. At first, her heart rate was 76 BPM and her oxygen concentration was 94, which were completely normal, but the bag deflated and inflated in time with her breathing, indicating that it was tightly sealed. After a while, her breathing gradually became faster and her heartbeat stronger. Her heart rate increased and her oxygen concentration decreased, so it was clear that she was losing oxygen in her body. When she said, "I'm in pain," we removed the bag, and her heart rate gradually decreased and stabilized, but her oxygen concentration did not return to normal and remained low for a while.
Yuki put her own body on the line to prove just how important oxygen is to humans.
Once their breathing had calmed down, we had them breathe again with the bag over their head so we could see how their oxygen concentration and heart rate changed.
When I asked him what he thought at the end, he said, "It was really painful."

Next, we had them step up and down a step stool and then inflate a balloon.
We have asked Yuki to wear a stethoscope while she is climbing up and down the step stool, so we can hear the changes in her heartbeat as it gradually gets faster. However, when she finishes climbing up and down the step stool and moves away, the stethoscope shifts and there are some parts where we cannot hear. Thank you for your understanding.
I'm already out of breath from all that strenuous exercise, and now I'm making him blow up a balloon. I'm such a devil.
As expected, the balloon wouldn't inflate due to shortness of breath, and although I tried my best to inflate it while breathing heavily with my shoulders, the balloon just wouldn't inflate. My heart was beating really fast, "dock, dock, dock, dock," but while I was straining to inflate the balloon, my heartbeat slowed down to "dock, dock, dock," which put a lot of strain on my heart and lungs.
Although I wasn't able to inflate the balloon all the way to the end, I'm satisfied that I was able to capture the sound of the heart in a situation that we don't normally get to hear.
Finally, Yuki shared her thoughts.

To check the heart rate when performing compressions after exercise, we have the patient step up and down the step again, and then have them stand against the wall while performing compressions.
Here, the video starts immediately after the step-up and step-down is completed.
As I pressed against Yuki's chest, I could feel her intense heartbeat in my hands, and it felt as though I was touching her heart directly. I could also feel my hands twitching in time with her heartbeat.
The heart is beating hard as it tries to pump blood while being compressed, and you can see that it gradually calms down once the pressure is released.

Next, I touch Yuki's nipples and record the sound of her heartbeat. I touch her nipples in the order of right side, then left side, then both at the same time. As I touch them gently and slowly, her nipples gradually become hard and larger. This video may be irresistible for those who love nipples.
At times, they also voiced their feelings. At the end, they shared their thoughts.

In the video of Yuki's heartbeat while being massaged with an electric massager, I apply the electric massager to her and record her reaction and heartbeat. The camera angle hides the point where I'm applying it, but you can tell she's feeling it from the sound of the massager and the lewd sounds Yuki occasionally lets out. After applying it for a while, she says, "I'm about to come... I'm coming," and then her body starts trembling and she reaches orgasm. At the end, she says, "That felt so good." Pay attention to the change in her heartbeat as she does so.

The heart sounds recorded while he was in the bathtub started from the moment he was submerged. Of course, we recorded his heart sounds from that point on. When we asked him if it was hot, he replied, "It's a little hotter than when I usually bathe," and as if to back that up, his heart was beating fast and his heart rate was about 98 BPM.
He's been in the bath for a while, saying things like "it's hot" and his face is covered in sweat.
When he got out of the bathtub, his heart was beating even faster than before, "beep, beep, beep." When I put my hand to his chest, he said, "I can clearly feel my heart beating." When I checked his heart rate with a pulse oximeter, it showed 133 BPM, which tells you just how hot the water was.
I tried applying some pressure, but I noticed that it was flapping even more than after exercise.
We also noticed that Yuki's solar plexus was twitching slightly, which we also captured on video.

*The format is "MP4" and the size is 1920 x 1080.
*We have confirmed that the models are over 18 years old. Providing, transferring, selling, etc. to third parties, and uploading to other sites is strictly prohibited.
*The model's face is not blurred in the main video.