One Piece: The Template System - Chapter 44: On the Seas

In the year 1257 of the Federation Calendar, Chen Pingchuan, who has crossed into a different world for three years, gets the Apocalyptic Wasteland Simulator.Through information obtained from the simulator, a sudden disaster will strike Spring City in a year. Accompanied by highly radioactive red rain, a type of mutated creature called Black Demon will be born.With the simulator, Chen is in a better position to survive, but he also wants to find out the secrets of the girl he meets in simulations.Simulator: [She left you a small bottle of liquid with an unknown effect and a note with just two short lines written on it.][Avoid the red rain!][Forget me!]

TL Description: Eat The World Tree is about a strange guy, who happens to be extremely curious and unable to stop himself from acting on his curiosity. The MC makes a slight mistake and travels to another world, and must fulfill specific quest or face varying levels of consequences (normally death).

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.

Ruel finds himself thrust into a brutal post-apocalyptic world, bound to a bizarre “Milf System.” This system demands morally questionable acts – NTR, seducing milfs, and claiming other men's wives – as the sole means of gaining strength and essential survival skills.The brutal reality of this new world awakens Ruel's hidden lust and dark desires. He swiftly abandons any semblance of morality, embracing the system's perverse demands with growing fervor.Driven by an insatiable hunger for power and pleasure, Ruel revels in the ravages he inflicts, using his newfound abilities to dominate and conquer.His journey transforms him into a ruthless force, where survival is intertwined with the satisfaction of his darkest urges, leaving a trail of broken relationships and conquered women in his wake.