Introduction to Survival Manga

A brief description of the manhwa Introduction to Survival:

‘Remember.’ ‘One, two, three, four, five, six, seven… eight’ ‘I will remember to the end… to the end…’ The day my wife, Julia, was trampled on by them, all my life and my goals, with burning hatred stained Yes, you have to kill them. “The day the revenge ends, bury me next to her.” Until that day, I must survive. In this survival game where you risk your life…