At times like these, one must not lose their composure.
Reji carefully recalled and connected all the key clues - the insect eggs.
When he first encountered the insect eggs, which was also when he first came into contact with the human world, he and Leon speculated that the insect race might have taken advantage of the human-demon war, during the period when both sides were in a stalemate, and parasitized the human world.
But in the subsequent investigation, it was discovered that the insect race was actually the victim. All the parasitism of humans was deliberately man-made, coming from the hands of that Emperor. The insect race was one of the many world races destroyed by the Emperor.
At that time, Reji was very puzzled. Why did the Emperor do this? And why destroy other races?
It was not until he reached Stillwater Prison that he learned the truth from the mouths of those foreign race remnants.
This plane had always been in a morbid state.