shxxkiii's manga / #strong male lead(3)

Kang Hyunmoo is a dirt-poor man whose ambitions to become a hunter have been destroyed. But one day, while he was fantasizing about becoming wealthy quickly, something popped up in front of him. [Difficulty: Hell. You are entering the Star of Apocalypse.] He'll now have a monopoly on items and skills in a monster-infested future Earth!

He learnt the strongest martial arts only to be killed and be reincarnated as a rural village officer as Master Baek, The One Hit Teacher!