With the mention of "Shifei" and a tender response, the relationship between the young man and the beautiful woman in the cabin seemed to subtly change.
However, unlike ordinary men and women, or wild creatures, they did not draw close after becoming emotionally moved, nor did they use any kind of plant as a verb to enjoy the comfort brought on by "life's encouragement to reproduce"…
The comfort of an Earth Level existence did not lie in this, but in being "complete".
Turning into mountains and rivers, yet those mountains and rivers remained isolated parts of the vast world, thus… the pursuit of one's own completeness became the ultimate need of an Earth Level existence.
However, this "completeness" could not be achieved by one's personal efforts, just as a man could not complete the task of procreating by turning himself into a "Devil Muscle Man".
No matter how strong you are, you are only the strength of mountains and rivers, not completeness.