I am really not a medical immortal. - Chapter 1637 - 1636: Consecutive Breakthroughs

One day every human on the world suddenly receives a mail claiming to enact the World Salvation Project. Half in doubt Kurosaki Shion, a diligent university student and loner, follows the mail’s instructions, becoming one of a million Demon Kings governing his very own Domain in the new world.

*** This is a post-apocalyptic story containing many fantasy elements. It is a somewhat dark tale following Shion as he grows while aiming for the unification of the all too sudden new world. It has many game-elements bolstered by strategical thinking while at the same time providing funny moments and romantic encounters.

You say you know about pain? To feel this sort of hunger... for your body to never be satisfied... your mind crazed by endless thoughts of satisfaction. To gaze upon the stars and know that it’s not enough, That is pain. Now you stand before me and I truly question myself. are you enough.He sought a cure for his power. Now, he'll use it to consume a world.At six years old, Dax's life ended. His trait, [Insatiable Hunger], awakened—a curse that promised only madness and an empty stomach. After two years of torment, he found his answer: [Synthesis], the power to integrate anything he touched.Four centuries of research later, known across galaxies as the Black Researcher, he finally achieved his goal. And in that moment of triumph, he exploded.Reborn in a brutal realm of cults and crumbling gods, Dax finds himself weak, but free. His Hunger is quiet, his Synthesis intact. The local gods think him a pawn. The cults see him as a sacrifice.They are all gravely mistaken.Dax sees this world for what it is: a Petri dish. His new traits are the ultimate research tools. His goal is no longer mere survival, but the answer to a new, thrilling question: Can a man who was once devoured by his own power, now learn to devour divinity itself?

Rin was a nobody—just a gamer with a love for manga—until death dragged him into another world.Reborn as Auren, the third prince of the cruel and war-hungry King Aurelus of Austerra, he enters a realm ruled by magic and divine systems. Every person is born with a Divine Frame—a gift that defines their class, power, and fate.Everyone… except him.Frameless. Powerless. Disposable. Auren is cast aside as a mistake that shouldn't exist. But hidden beneath that flaw is a terrifying truth: no Frame means no limits. With nothing holding him back, he begins mastering all paths—mage, warrior, healer, assassin—enhancing them with Earth’s forgotten science.In a world that thrives on order, Auren is chaos. And from that chaos, a legend is born.

An old man dies, torn by regret. Due to his high karma, he has “near-limitless possibilities for reincarnation”. He chooses to reincarnate in a fantasy world as a voluptuous futanari succubus with big tits and an irresistible smile.