I Don’t Want to Die as a Mob in My Second Life! ～A Story Where I Kept Training from Inside the Womb and Ended Up Being Mistaken for a Monster～ - Chapter 04: The Ultimate Perfect Fetal Body, Complete!?

Chapter 04: The Ultimate Perfect Fetal Body, Complete!?

“Hmm… let’s tweak this here, adjust that over there… and maybe make that a bit bigger…”

It had been a few hours since I shut myself inside the Spiritual Domain.

I was still deep into my ‘Spiritual Body Modification’ session, giving endless instructions to my body, like “Become like this eventually!”

“Ah, this is so much fun…! You can’t make changes this freely with ‘Spiritual Body Modification’ once you’re fully grown. It’s way too fun to tweak things as easily as in a game…!”

By the way, I hadn’t returned to reality even once since starting.

Well, there’s nothing to do in the real world while I’m in this fetal state, so it’s fine. Maybe I’ll just stay here for the whole three months.

“Man, I’m really getting into this character editing stuff—especially since it directly affects my strength.”

Right now, I was working on reinforcing the muscle fibers throughout my body.

At the Spirit Academy, they teach anatomy specifically for ‘Spiritual Body Modification.’ Using everything I learned there, I was building my ideal body.

“It’s fun, but it’s also tricky… Muscles aren’t just about slapping them on everywhere. How you develop each muscle affects how you move during combat.”

Athletes are a great example of this.

For instance, sprinters focus on developing spindle-shaped muscles that allow for quick, rapid movements, while weightlifters focus on building pennate muscles that give them raw strength.

If you try to max out both types, they might end up interfering with each other. Plus, it could make me unnecessarily heavy, which would slow down my speed.

“Hmm… there’s a lot to think about. Whether I’m attacking or running away, strong legs are crucial. I should focus on developing the quadriceps and hamstrings to ensure stable, long-distance running. By strengthening the iliopsoas, I can keep my hips stable and improve running efficiency even more. That’s a good plan. But should I go for slow-twitch muscle fibers like a marathon runner for endurance, or fast-twitch fibers for explosive speed…? It’s a tough choice.”

I pulled up a transparent view of the fetal version of me in the window and started tweaking the internal structure, adjusting this and that. Ideally, I want a balance of explosive power and endurance—a perfect mix.

But it’s not just about muscles. Bone structure matters too. Even if the muscles are perfect, if the bones don’t match, the body’s balance will be all over the place.

“The length of each bone is important too. If I lengthen my spine and make myself taller, I’ll have more room for muscle across my body… but just being tall isn’t the answer. If the muscles stretch too far due to the bone structure, it lowers the efficiency of force transmission. It also makes me less agile and increases my chances of getting hit.”

Humans are fragile creatures—lose even ten percent of your body mass, and it’s often a fatal injury. So, it’s better to keep my target area small and stay quick.

“I don’t mind being on the shorter side. I just need to make my legs longer to maintain a good stride. Plus, I can pack plenty of powerful muscle fibers into my lower body—quadriceps, glutes, calves, and so on…”

I added more muscle fibers around my legs and gave the bones in my legs a command to “prioritize growth.” This should help them grow strong and steady.

“Well, this part is just a draft for now. Lower body strength is crucial, but that doesn’t mean I can ignore the upper body. Especially the back muscles—they’re the foundation for all movement.”

I planned to develop the upper body properly too, making sure it balanced well with my lower body.

“What should I do about arm length…? Shorter arms would improve power transmission. But if I make them longer, I’ll have better reach, and it’ll help maintain a good rhythm when running, which means a more efficient stride. And then there’s shoulder flexibility. More flexibility would increase swing speed and allow for a wider range of movements. But if I make them stronger, it would boost my punching power…”

And so, I kept tweaking things for hours.

Even though I’m a baby, I don’t need sleep right now. Since my consciousness is focused inside my soul rather than my brain, it doesn’t matter if my physical body is asleep.

“Kanataaa~”

“Ah, here, read this next. Hmmm…”

I made a manga appear inside the Spiritual Domain and handed it to the Conceptual Spirit trio.

This place is within me, so I can pull out manga from my memories or even make a TV appear that plays anime.

The content is almost flawless because it directly pulls from my episodic memories stored in the hippocampus of my brain.

If the body is like the universe, then the soul is like an Akashic record. It’s a place where I can recreate every experience my brain and body have gone through.

I often like to dive in here because it’s the only place where I can forget my usual “mob” status and feel a sense of omnipotence.

“Alright… time to get back to my ‘Spiritual Body Modification’.”

I had managed to arrange the skeleton and muscle fibers to a decent extent.

I can only freely tweak things while I’m still a fetus. I plan to keep refining the details and adjusting as I calculate my growth over time, but I think I’ve made pretty good progress.

Not just a perfect body ratio, but a ‘Golden Body Aesthetic’…

It’s a level of physical perfection that’s nearly impossible to achieve naturally. I could see glimpses of this ideal form in the transparent view of my fetal self.

“As for my organs, I’ll just make my heart, lungs, and liver extra strong for now. While the way you develop muscles affects how you move, the ‘strength’ of organs tends to follow a similar standard across all animals.”

A heart that pumps blood like a champ.

Lungs that circulate oxygen like a pro.

And a liver that breaks down toxins like nobody’s business.

These three—heart, lungs, and liver—are like the holy trinity. Whether it’s a carnivore, herbivore, or any kind of athlete, if these three organs are well-developed, they can become incredibly capable.

Well, except for our sloth friend.

That guy overheats and dies if his heart rate goes up too much…

“The muscles around the heart and lungs are important too—the diaphragm and intercostal muscles. If these are well-developed, they help with the contraction of the heart and lungs. And I should beef up the pectoral muscles to protect the heart and lungs too. It might make my chest a bit bulkier, but it’s better than getting a hole punched through my body…”

I recalled the time the Meat Angel’s tentacle put a huge hole in me. I never want to experience that again.

“Alright. Now that I’ve refined the muscles around my torso, I’m getting closer to that ideal physique.”

Next up…

“Skin. How should I shape the appearance?”

Just as I said that, the bored Conceptual Spirits suddenly came flying over, shouting, “Looks fun!”

“Hey, what’s with you guys!? Just keep reading your manga quietly!”

“No! Kanata, let’s mess!”

“Don’t mess with me!”

I tried to summon a cage to trap them, but [Ittan-momen] wrapped me up tightly, asking, “I tie!?” while [Blank Shot] planted itself in front of the mouse and keyboard!

“…!”

“Hey, [Blank Shot], what do you think you’re doing!?”

“～～～！♡”

Without saying a word, [Blank Shot] used its gun-barrel head to press the mouse, turning my mouth into something like a cannon!

This guy’s got some seriously twisted preferences!

But then, [Doll], the little gothic figure, kicked [Blank Shot] out of the way, saying, “Annoying.”

Just as expected from the only girl in the group… so demanding.

“Only I, mess with Kanata.”

“H-Hey, what are you planning to do to me?”

“Be better.”

With that, she started typing away at the mouse and keyboard at an incredible speed!

What’s she doing!?

“Hey, don’t mess with my body however you like… wait.”

On the screen, the image of my fetal form—me—started looking more and more refined, even before being born.

It was like I was turning into a perfectly crafted porcelain doll.

“Oh, right. The concept of [Doll] includes an aspect of external beauty. I guess her sense of style is top-notch.”

“Waaaa!”

[Doll] worked on my appearance with a level of enthusiasm I’d never seen before, all while keeping a blank expression. She fine-tuned my skin tone, hair color, and more with expert precision.

“Hey, hey, don’t make my looks too flashy…”

“Woooooooooo!”

“Oh no, she’s not listening.”

True to the nature of a Conceptual Spirit, [Doll] loved fulfilling her concept. She worked at a frenzied pace, shaping my human form with intense dedication.

And then—

“Done!”

“!?!!?”

What appeared was an incredibly stunning fetus, with golden and red eyes and white hair.

It was pure beauty… there’s no other way to describe it. Like something crafted by God Himself, using the finest love and care on a bed of angels. Even though the figure floating inside the transparent window was still developing, it possessed an astonishing level of beauty.

It looked as if it had grown up in a cradle made of jewels… its pale skin shone with a pearly radiance, reflecting light with a brilliance that was pure, clear, and serene. The way I had arranged the muscle fibers to align with the golden ratio of human anatomy made it even more striking, with a glow of beauty that seemed to come from beneath the skin—an absolutely stunning fetus that now reigned over the Spiritual Domain.

Wow… it’s perfect. That level of beauty was just too perfect.

The small forehead was smooth, forming a gentle curve from the forehead down to the nose, creating a golden arch that brought harmony to the entire face. The cheeks had a soft, rosy glow, like rose petals. It was so beautiful that you’d think a kiss would melt its lips… it was the kind of beauty that would make anyone imagine such a dreamlike scenario.

And of course, the beauty didn’t stop at the face. It extended down to the rest of the body. The arms and legs, though small and delicate, had a graceful shape that hinted at the elegant movements they would one day make. The fingers were as gentle and graceful as an angel inviting a soul, and even the nails were transparent and flawlessly shaped.

It was terrifying… This form, embodying the ultimate mystery and beauty of life, was enough to send chills down my spine.

Even though the fetus wasn’t even born yet, it radiated an aura of divine beauty. If something like this had been born in ancient times, people would have bowed their heads and knelt in reverence, and theologians would have emerged to study it.

“Behold, the goddess of beauty has descended—”

They’d write that in books, just to describe it.

“—wait”

I glared at [Doll].

“Y-You went way overboard, you idiot!!”

What is this!? What is this!? What the hell is this!?

Am I really supposed to have a body with beauty stats maxed out to SSS, to the point where you can’t even tell the gender!?

And now you want me to shove my mob soul into this thing!? The mismatch is going to give me a constant headache!

“It’s like putting a pile of rocks in a sports car instead of a proper engine…! Make it a little uglier, please!”

“Ruin you?”

“Hiii!”

[Doll] was seriously furious…!

“Ruin, ruin, ruin?”

“Stop it! The way you’re mad is terrifying!”

Well, I guess it can’t be helped. One thing Conceptual Spirits are really bad with is when you do or say things that go against their very concept.

For example, if you expose a [Grass] Conceptual Spirit to fire, it’ll hurt it badly—so naturally, they hate fire.

And for [Fire] spirits, getting hit with water can extinguish them, so they get super mad when any liquid gets near them… you get the idea.

In this case, it’s like I told [Doll], whose whole thing is charming and enchanting others, “Stop doing that”…

“Ruin, ruin, ruin, ruin, ruin, ruin, ruin, ruin, ruin, ruin?”

“Alright, alright, I get it! I was wrong, so please stop saying ‘ruin’ ten times a second…!”

“Forgive-ruin!”

“Which is it!?”

Ugh… I guess I have no choice but to be born looking like that…

Well, I suppose having a good appearance isn’t such a bad thing. Since it’s still based on me, if you look closely, you can kind of see a bit of my old look.

It’s like taking Kanata Soranaki’s appearance level from 1 straight up to 999—it’s almost like I’m a different person.

“My sister and brother both inherited my mom’s good looks, while I was the only one who took after my dad with this generic, mob-like face. Maybe now I’ll finally match up with them… yeah, sure…”

I convinced myself with some rough logic and decided to move on to the next part of my training.

“Alright. My physical body is almost perfect. Now, it’s time to lay down the spiritual pathways…!”

This is a task that’s just as important as building my body, and it’s directly tied to how strong I’ll be as a Reisoushi.

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[Tips]

Spirit Academy: A special institution that takes in children with spiritual power and trains them.

These academies are located in places like Izumo, Ise, Koyasan, Kirishima, Samukawa, Nikko, Iwakuni, Osorezan, Hakone, Kamakura, Lake Toya, and Seefa Utaki.

In addition to training in spiritual arts, they teach anatomy to help with ‘Spiritual Body Modification’ training.

[Blank Shot]’s Preferences: People with big mouths ♡

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