Goodbye! I'm Being Reincarnated!

In this final chapter, we learn that the world was once ruled by two civilizations: the mu and the atlantis. Both kingdoms were overthrown by the other, and the world turned into a "feturia" . The family of Atsuko, the hero, is left behind, and he laments the loss of his family. The two kingdoms fought each other and built a system to manage the world, but the system eventually died out and mankind became dependent on it. The world grew stagnant, relying on the system only and magic. The last sage who created the system, he tells us, is the one who created it. He tells us that he'll have to settle this problem, because the world won't accept humans of the royal knight's gear, and if it doesn't, then he's going to have to pitch in a little bit. He hears the sounds of all the forces of the kun, the world's land, attacking. He's happy to hear this, because it means that he can finally meet his son. The son is named Yumi, and Yumi is 15 years old. Yumi tells the hero that he came to protect him from the fallen hero, the dark knight, and that he now has to die and destroy the feturia of his son, who was killed by a truck when Yumi was a kid. The hero tells Yumi that he and his son are here to save him, but they can't kill him now, so Yumi has to go home.