Reversion of the Martial Deity: Level 2 Redux

[No. 4212. “Humanity” has been defeated in the relegation match.] [The eradication of humanity has now begun.]   The earth failed its final mission and was destroyed. Hero, the last survivor and the Warrior Star, regressed back to the ‘First Time’ just before his death.   I, Hero, will live as a Japanese from now on! From this point forward, please call me I R.   As soon as he opened his eyes, he heard the news of his brother-in-law’s betrayal, who was called the Sword King of South Korea.   “…I’m going to fuck up that bastard first.”   Revenge will be done as thoroughly as possible, and plans will be made without a flaw. Behold the limitless acts of the God of War of South Korea, Hero, who will save the future from destruction and attain peace!