Blood that stains the world

Our protagonist was living under the mirage of a false beautiful and happy life though in reality the world of that time was pretty corrupted by the evil leaders and higher ups. But one day the mirage broke when his beloved father killed his mother brutally in front of him. He then out of anger and sense of revenge also killed his evil father. And on that day he took an oath to annihilate the evils. But for that he didn’t choose the righteous heroic path rather he believed ‘Only a Devil can annihilate evils.’ To fulfill that goal he learned all kinds of fighting styles and with his smart brains he started eliminating the evils a.k.a the leaders and higher ups. How will things end up for our devil disguised in the human avatar, will be revealed…….