"Hmm, actually, before I forget..." Shiki mumbled to herself, though this sounded like booming thunder to the shrunken Kinako and Natsumi.

Shiki pulled out a small pod-like device from her skirt pocket.

"Girls, get in this pod. It will keep you safe while inside the tampon, and absorb biometric data about our periods as well. If you don't to be soaked in a literal bloodbath, I suggest getting inside."

Shiki inserted the pod into the tampon, where Kinako and Natsumi were lying in wait. Fearing Shiki's warning, Kinako quickly entered the tiny biometric pod. The pod looked like a black speck to any normal sized person, but to the shrunken girls, it was a large, futuristic spaceship.

 

At that moment, Tomari walked into Liella's clubroom, giving Shiki another idea.

"Ah, Tomari-chan. Hello."

"Shiki-senpai, hello. What are you doing, if I may inquire?" Tomari said with a curious head tilt, looking directly at the tampon between Shiki's fingers.

The two stoic girls had different ways of expressing their emotions, but they each had shared love of science and data.

Shiki gave a sly smile. "I was about to conduct an experiment. I wanted some biometric data, and was just looking for a suitable subject. Do you happen to be on your period, if I may ask?"

Tomari furrowed her brow and wrinkled her nose, looking a bit disgusted and skeptical. "Well yes, if you must know, mine just started today... I just came in to grab a tampon..."

"Here, use this."
Shiki said, holding out her hand to offer the tampon containing their fellow school idols. "Do you see that teeny tiny speck inside it? It's a biometric analyzing device. It will record all sorts of helpful data about your body's health if you put it inside yourself during your period. We can keep track of the data together."

Tomari's eyes lit up the instant Shiki uttered the word "data". 

"Y-you built something like that? I would love to know more detailed info about my body's vitals... Can it really analyze that through period discharge?"

Shiki nodded, trying to hide her obvious smirk, she knew her impromptu plan was working. "Yes. Just place that teeny tiny speck into each new tampon you use every time you change it out."

Tomari took the tampon that contained both her senpai Kinako and her older sister Natsumi.

"Let's meet back up tomorrow after school and see what data we've gathered," Shiki stated. She didn't want to intentionally leave her friends stranded inside Tomari's vagina too long... For now.

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October 4, 2025
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