Overlord (WN) - Volume 1 Chapter 34

Ever since she transmigrated, she was blessed with an inbuilt anti-poison detector.

An unexpected discovery in Machu Picchu has transported a young professional thief from Earth to a world filled with mystical powers and evil plots. With his beloved teacher and best friend killed during the calamity, his only goal is to become stronger, so that he can take revenge for them.This is a novel filled with politics, the struggle for power, evil beauties, and of course, Divine Immortals.

- Description from Novelupdates

With a marriage contract forcefully done, he married her, and all she could do was comply, and resent him deeply for that and for all the following misunderstandings they faced.
However, it was already too late when she understood she actually loved him.

Kieran Silver is a young man who suffered from the deceit of his superiors. His outstanding talents and exceptional prospects to climb to the top of Zenith Online dismayed his superiors.

They invoked their influence to suppress his uprising, ultimately causing his demise. However, rather than perish, Kieran Silver receives a second chance.

A chance to dethrone one of the top 10 guilds, Golden Brigade. An opportunity to create an immortal legacy that would forever live on in players' minds. The ability to reach the zenith in both worlds!

However, as he is reborn, Kieran notices a few things that are different from what he remembered. Could it be that he has gone back in time, or is there an even deeper explanation and a larger power at play?

These questions will be answered, whether forcibly or inadvertently, as Kieran explores a seemingly driving force.

The advent of the Legendary Berserker begins!