Humans started engaging in agriculture approximately 10,000 years ago. At first, they grew wheat and green peas. From there, human civilization has been constantly developing. Right now, developments in science and technology, terrain and natural environments, art, thinking, and economics seem to have thoroughly surpassed all limitations… Despite all this, there is a region which, ever since the dawn of human civilization, has remained unsolved. A region that no kings or sages have ever been able to conquer. A region which sages gave up on trying to conquer and deemed accepting it to be unconquerable as correct. That is the region known as not dying. But humanity had proof before it that it exists at the cellular level. The mechanism is astoundingly simple. The equivalent exchange of cells. Even setting moral issues aside, unlike induced pluripotent stem cells and cloning, it’s simple replacement. By my calculations, the cellular replacement of an entire body can be done in just two hours. Josuke, if the sages of this world witnessed you, what would they think about death…?