Shinwa Densetsu no Eiyuu no Isekaitan - Volume 9, Chapter 2 – Roar In Silence, Part 1

A man suddenly finds himself inside the world of his favorite game, Brave Hearts, after a night of gaming...Mistaken for “Raye Alvah,” the ruffian second son of a duke, he faces hostility from strangers and is publicly disowned by the noble family!And as he pieces together his strange new reality, he realizes he’s living as a minor villain destined to be forgotten after being defeated by the protagonist!And now...“Fuck this shit, why did it happen to me?”He must adapt to survive in this world.

A surgeon accidentally got the blessings of a system, shocked the medical industry, and rejuvenated countless people.

- Description from Novelupdates

Ryan «Quicksave» Romano is an eccentric adventurer with a strange power: he can create a save-point in time and redo his life whenever he dies. Arriving in New Rome, the glitzy capital of sin of a rebuilding Europe, he finds the city torn between mega-corporations, sponsored heroes, superpowered criminals, and true monsters. It’s a time of chaos, where potions can grant the power to rule the world and dangers lurk everywhere.

Lacking a pocket dimension, lacking a power, lacking a thigh to hug onto and the three life advantages (money, power, and looks), he had been cautiously living in the apocalypse for ten years, getting closer to falling inside the zombie’s mouths. But unexpectedly, he had the terrible luck, to be caught in a fight between two gangs and die, it really left people feeling disappointed.