Botsuraku Youtei Nanode Kajishokunin wo Mezasu - Chapter 1-18

As a student, Lin Li suddenly owns a system and he expects it to be powerful enough to make his life better. However, unlike systems he has seen in novels, this system is so random.[Quest Triggered!][Quest One: Slay ten Little Demon Heaven Blood Crows that frequently attack and kill villagers around your village.]“How could I find these Crows in a modern society? ”An oblivious mosquito with an annoying buzz flies over and lands on Lin Li's hand.“Snap!”[Killed Little Demon Heaven Blood Crow (1/10).]“Eh?!?!”

Ron finds himself reborn in the world of One Piece, stranded on a remote island in the East Blue. But he's not just any ordinary child—he’s bonded to a mysterious sign-in system that grants him powers with every new location he visits.At his first sign-in, he unlocks the legendary Sun Breathing Technique, along with a boost to his vitality. From Shitmotsuki Village to Skypiea, Enies Lobby to Marineford, Ron travels the world, collecting extraordinary rewards that make him a force to be reckoned with. The Raikiri, one of the 21 Great Grade Swords, Armament Haki, Observation Haki, and more fall into his hands.As Ron steps onto the battlefield of Marineford during the legendary Summit War, the mightiest warriors—Four Emperors and Marine Admirals alike—pause, stunned by his presence. But Ron merely waves them off, “Don’t mind me. I’m just passing through.”Join Ron on his journey across the Grand Line as he signs in at iconic locations, growing stronger with every step. This is not just an adventure—it’s a legend in the making.

As Wanzhu Corporation’s number one assistant, Lin Hui was, without a doubt, an incredibly outstanding individual.

The CEO trusted him. The employees relied on him. Their business partners appreciated him.

Lin Hui’s career was like a duck to water. However, he had been secretly in love with his boss for several years.

Just as he thought his life would continue like this forever, he and his boss accidentally…

Within Wanzhu, no one could say no to Assistant Lin. Not even the CEO.

- Description from Novelupdates

Jacob Steve, an Old Man, died at 116 after living a whole life.

But Jacob always had a dark side, which he always suppressed and hid from others.
However, in the later years of his life, when death was inevitable, he understood there wasn't any point in having wealth, knowledge, or desires if you couldn't have a life to enjoy them.

He became obsessed with fabled immortality and devoted his reaming life to extending his fleeting lifespan, but just like any other failed.

However, he mysteriously got another chance at life and found a way that led to fabled immortality.
But he was also forewarned that the way led to it was filled with blood and darkness!

In the end, Jacob chose it anyway with no way of going back, and it was also the start of his suffering and his icky, brutal journey toward the 'Immortality' he wanted so badly!