In the prologue (chapter 0) it says that people believed that a scientist whould find the immortality and when everyone was excited about that idea, more havoc and calamity happened (eartquakes, etc). I think a scientist actually found the immortality and Guwon is the result of that.
In the prologue (chapter 0) it says that people believed that a scientist whould find the immortality and when everyone was excited about that idea, more havoc and calamity happened (eartquakes, etc). I think a scientist actually found the immortality and Guwon is the result of that.