Return of the Youngest Son with SSS-Rank Talent - Chapter 6: Killer Voice

Civilization is destroyed and records lost. Only Dudian survives in a cryogenic sleep. Three hundred years later, Dudian wakes up and must become Dean to survive. Who can he trust in this world overrun by monsters without and within?

- Description from Novelupdates

Mason was a mercenary, until the day he died on a mission after being betrayed by his unit.

The more he got to the Comprehensive world, Beiyuan Baiqiu originally thought it was just an ordinary Comprehensive daily world.

Who would have thought that after entering high school, unusual things would happen one after another, and I would awaken myself through the simulator.

Since then, Beiyuan Baiqiu has embarked on the road of being invincible.

[Demon Slayer, Campione!, No Game No Life, Problem Children are Coming from Another World…]

- Description from novelbuddy

A young man, a modern-day history and war enthusiast, finds himself reincarnated in the body of an orphan — one destined to inherit a small, struggling barony from his dying uncle. But fate offers no easy path. Inside the family, greedy rivals lurk, eager to steal his inheritance. Outside, hostile neighbors eye his weakened lands, ready to tear it apart at the first sign of weakness.This is a tale of ruthless ambition, cunning strategy, and relentless struggle. From a powerless orphan to a baron, from the weakest barony to the mightiest duchy — he will rise through blood, steel, and fire.