The ones who bought Hiroto was a laboratory that carried out illegal research. As he was examined there, it became clear that he was more inept at magic than any ordinary person in Origin.

In Origin, there were seven attributes of magic that could be used – the four elements of earth, water, fire and air as well as the additional attributes of light, life and spatial magic. It was common knowledge that everyone had at least one attribute out of those seven that they had an affinity for.

However, Hiroto demonstrated no aptitude for any attribute whatsoever, let alone any affinity. In other words, he was an existence that defied logic, inferior to even an ordinary person.

But the people of the laboratory realized that Hiroto owned a vast Mana pool that was far greater than that of an ordinary person.

He had incredible amounts of Mana even though he had no aptitude for any attribute. This was a bizarre contradiction in the eyes of the researchers. And among them, one suddenly came up with an idea.

「It’s not that this experimental subject has no affinity for any attribute. Rather, there’s another attribute that we’ve not discovered that this subject has an affinity for. Isn’t that possible?」(Researcher)

From that point, their research began. It was around then that Hiroto’s memories of his previous life returned.

After several years of research with Hiroto as a human subject, they discovered the eighth attribute – the attribute of death. The researchers had Hiroto learn the death-attribute magic that they had discovered and reconstructed his entire body, including his brain, to continue their research and experiments.