Apocalypse: A 7.62 for the Leader

【Apocalypse + Multiple Women + Harem + Not a Saint + Zombies + Leveling Up + Invincible】 You have such a big air, but no official rank at all? Apocalypse? Harem system? They really give you a gun? Just hand the leader a 7.62 round. Gun in hand, follow me, snatch the secretary, kill the old dog. Laughing as I embrace a hundred beauties in my harem, pointing at the rich brats' mass grave. — Description from novelcodex.org