MTL - My Darling Sick Beauty - Chapter 77

An average man is reincarnated in the world of DxD! How do you survive in a world of battle-hungry monsters? With a cheat skill, of course! Devour the competition, becoming stronger with every fight! From the depths of the Familiar Forest, the Beast King will rise. (Harem, Gamer!SI)

As a virtuous wife, does it include tolerating his cousin, enduring his concubines, bearing his mother?

“I was nothing... and now, I have one chance to steal everything.”In his previous world, Ethan was just another failure. No talents, no dreams, no hope.But death wasn’t the end it was a new beginning.He wakes up in the body of “Valerian Lucard,” the son of a great family... but the weakest among them. Neglected, shunned, broken.But this time, things are different.He has an unbelievable ability:Fate Theft.Skills, talents, future opportunities... he can steal them, but at a heavy price.And the worst part? What’s stolen... never lasts.Now begins his race against everyone: the elites, the geniuses, the chosen heroes.Not because he's strong, but because he refuses to be nothing... ever again.In this world, either you steal glory... or everything gets stolen from you.

A world filled with heroes with superpowers. A world attacked by calamity fiends. A modern world filled with wonders and dangers.