LUCKY REINCARNATION: REINCARNATED WITH A HAREM SYSTEM - Chapter 87: One last time

Professor Kang lived the same day on repeat - same lectures, same coffee, same quiet evenings.Unremarkable in every way.That is, until the day he died trying to save a student.When he opened his eyes again, he wasn't in a hospital. He wasn't even human anymore.Reborn as the weakest of monsters - a slime - in a world where the strong devour the weak, survival is the only law that matters. But if clawing his way up means becoming the apex predator himself... well, so be it.

Eighteen years ago, she saved his life. Eighteen years later, he gave his heart to her.

He asked her if she was willing to be sexually abstinent for the rest of her life, yet he kept her busy day and night. To the public, he’s sexual impotent, but only she knows how sexually passionate he is.

In his special way, he let the entire world that she was his one and only!Eighteen years ago, she saved his life.

Eighteen years later, he gave his heart to her.

He asked her if she was willing to be sexually abstinent for the rest of her life, yet he kept her busy day and night. To the public, he’s sexual impotent, but only she knows how sexually passionate he is.

In his special way, he let the entire world that she was his one and only!

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In a certain world, there was someone who excelled in magic combat, people called him 『Sage』. Seeking the strongest combat art, he devoted himself to research every magic and combat arts in existence. And the conclusion he arrived at was very cruel, 『My body is not fit for magic combat』. Yet he didn’t give up. He sealed his own soul with a magic art, and was reborn in a far-off future. And the magic theory in the completely changed world he saw there was of unbelievably low level.

Kai’s life was small—coffee-stained mornings, cracked recipes, and a system in his head that tweaked toasters and dough like it was nothing. Then the sky shattered. Aliens—Skraiths, jagged and brutal—invaded, tearing his city apart with green-glowing weapons and relentless claws. Superhumans rose to fight back, fire and lightning blazing through the chaos, but Kai’s world crumbled with them.Hiding in his apartment, Kai stumbles on blood—human and alien, smeared on his wall after a superhuman battle. His system, once just a tinker’s tool, awakens, offering him a choice: mimic their powers, temporary and wild, through the blood itself. Desperate, he takes it—stealing pyrokinesis, then electrokinesis, then kinetic energy, each power burning through him, fading fast. But it’s not enough. Armed with a humming Skraith weapon and a body tougher from alien blood, Kai joins a ragtag crew of enhanced fighters—Liv, Rylan, Jace, and Tucker—scraping to survive in a warzone where every shadow hides death.As Skraiths swarm and the city burns, Kai’s system pushes him deeper, analyzing, integrating, crafting minor enhancements—durability, strength, sparks of power that could make him a target or a savior. Government factions, rogue scientists, and the aliens themselves start sniffing around, drawn to his strange tech and blood-stolen abilities. By the time Kai crafts his first super-powered enhancement—an artificial strength boost—he’s no longer just a tinkerer. He’s on the edge of something bigger, something dangerous, where blood and sparks could forge a hero—or break him entirely.In a world unraveling, Kai’s fight for survival becomes a desperate race to master his system, outrun the Skraiths, and confront the truth: the power he’s chasing might destroy him—or remake the world.