Death March kara Hajimaru Isekai Kyusoukyoku (WN) - Book 1 - 1-1. Cataclysm Begin Through Death March

[Warning: Mature Content, R18, Contemporary-Fantasy setting]Evanescence “Evan” Holz, a billionaire businessman, received a souvenir from an obscure country that creates s*x dolls called “Eternity Women.” These “Eternity Woman” are life-like and turn alive once activated. To activate them, you need to “use” them.There's only one way for anyone to use a doll: You “play” with them.But what if these Eternity Women weren't just s*x dolls that magically come alive? What exactly is the mechanism behind Eternity Women that makes them into sentient beings in the first place? Is it just the pleasure, or there's something else, something sinister, that gives them life?That’s for Evan to find out.***EXCERPT:“Raise your hips,” he ordered. His voice was husky and demanding.Eternity quickly did as she was told to do. He wasn't a mind reader, yet he knew that it filled her with desire that he was talking to her in such an authoritative manner.Evan slipped Eternity's panties quickly off of her, giving them the same treatment as her bra once they were removed. He flung them away with no care as to where they would land. He nudged her legs wider apart using his, signaling the impending act.As Eternity called it, 'penetrative intercourse.'“May I?” he asked, even though he knew how much she wanted it.She nodded, tears trailing down her cheeks because of how much she had done.“F*ck me, Evan.”

A failed investor from 2017 got drunk and woke up in the 1980s. China is just opening up, and the economy is blooming. There is also the dissolution of the Soviet Union, the bursting of the Dot-com bubble and other financial crisis. He used his knowledge of the future and slowly build up his empire.

- Description from novelupdates

“The world’s not fair, but fairness doesn’t pay the bills. You don’t wait for a handout — you build your own damn ladder, one step at a time.”Ethan Grey’s life was built on ambition, hard work, and hope — until a single accusation destroyed it all.Framed by his ruthless boss, Ethan loses his job, his reputation, and is left drowning in half a million dollars of debt.Cast aside by a society that thrives on crushing the weak, he’s at rock bottom with no way out.But in his darkest moment, something extraordinary happens. A mysterious system awakens, offering Ethan a second chance — but with rules.[Congratulations, You have awakened the Harem Investment System]It can’t make him rich overnight, and it won’t give him shortcuts. Instead, it points him toward physical investments: crumbling properties, broken-down machines, and forgotten treasures.Each one is a gamble, but with every success, the system rewards him with newfound skills and opportunities.