The Truth About 'Growth' | Defining the Human Boundary Through Body and Soul

How do you view human growth?
At what age does someone actually become an adult?
Where does childhood end, and which side do high schoolers belong to?
When does old age begin, and at what point does human decline start?
There seem to be clear boundaries, yet in reality, it is all surprisingly ambiguous.
Now, today's theme stems from that iconic scene with Nari-san in Chapter 3 of the manga Nino.

I would like to briefly break down the relationship between the growth of the soul and the growth of the physical body.
By the way, this content serves as a supplementary explanation to my previous commentary article.
If you haven't read it yet, feel free to check it out:
Now, let's dive into what I believe to be the truth behind human growth.
