The Pleasure Lord - Chapter 56 Demon Beast Tide

This is a story about the protagonist getting the system, going crazy in the biochemical apocalypse, producing aircraft and tanks, destroying zombies, saving good people and killing bad people.

- Description from novelbuddy

A young man woke up to a world of magic and endless possibilities.He was transmigrated.Great!Only that he now had three huge problems.One, he had no memories of his past.Two, he was a villain destined to die no matter the outcome.And three, the heroines were all kinda... should he say, obsessed?Yeah, he was fucked.[Note]No Yuri.Conflicting emotions of MC due to loss of memory for the first part.Huge plot twist, so don't fall for whatever you see.NTR? Not.But probably netori.Beta MC? Big No.Harem? Yes! Don't ask me how but I'll make it possible.

A skilled but unfortunate modern-day assassin was killed in a freak accident. However, he soon found himself summoned to another world by an evil wizard, who had him possess the body of a boy as an experiment. After successfully planning the evil wizard’s downfall, he used the wizard’s body as a springboard to gain influence and power in his new world.

- Description from Novelupdates

Born into one of the wealthiest families in the country, Layla Rosenzweig's true identity is taken away at the time of her birth by the mistress of her father. She is forced to live as the illegitimate daughter of the Rosenzweig Family. Everyone treats her no less than an outsider in her own house. “This is mine. That is mine. In fact, everything is mine,” Layla's half-sister told her. Everything that belonged to Layla is given to her half-sister, including her boyfriend. Then, she is forced to marry her ex-boyfriend's ruthless uncle, Lucius De Salvo, the most terrifying man in the country. Lucius De Salvo is known for his ruthless ways to get his work done. His name is enough to terrify people. It is said that he is a man devoid of emotions. He will find pleasure in people's pain and misery. He loves to torment those who come under his radar. But why is he so lovely to Layla? Or is it just a pretense?“Are you ready for the wedding night, Darling?” Lucius asked. “I've desired you for a long time.” “What?” Layla was shocked. “Why would you?” “Because you are Layla Rosenzweig. The woman I like.” With that, he captured her mouth for a passionate kiss.