Becoming Invincible in the Game-Invaded World - Chapter 618 - : The Suddenly Great Demon King Ox

This is a story about the protagonist getting the system, going crazy in the biochemical apocalypse, producing aircraft and tanks, destroying zombies, saving good people and killing bad people.

- Description from novelbuddy

An average man is reincarnated in the world of DxD! How do you survive in a world of battle-hungry monsters? With a cheat skill, of course! Devour the competition, becoming stronger with every fight! From the depths of the Familiar Forest, the Beast King will rise. (Harem, Gamer!SI)

Yi Feng, who was terminally ill, was reborn in the year 2000. In that year, his childhood sweetheart and school beauty Gu Muxi turned 18.“Yi Feng, lend me a pen!”“…Didn’t you just borrow one yesterday?”“Yesterday was yesterday, today is today, things change, don’t you understand?”“…I’m convinced, alright, here you go.”“Yi Feng, tear off a piece of paper for me to use!”“…Why tear mine? Don’t you have any?”“I do, but I don’t mind tearing yours.”“…You really have a way of thinking! Fine, fine, here you go.”“Yi Feng…”“…What do you want to borrow now? I don’t have anything left.”“Hmph, lend me your hand for a moment!”“…What for?!”“Nothing much, I just want to hold my boyfriend’s hand.”“Huh???”This is the daily life of a romance between childhood friends, filled with social awkwardness.A story full of sweetness, without any melodrama or heartache.Welcome aboard!~

Leo awakens in a world he doesn’t recognize, with no memory of who he is or why he’s there. All he knows is that survival isn’t just a necessity—it’s his only chance to uncover the truth.Thrown into a brutal test for assassins on a hostile alien planet, Leo quickly discovers an extraordinary instinct for combat and evasion—abilities that feel second nature, yet remain a mystery even to him.But as the blood-soaked trials unfold, whispers of his lineage begin to surface. In a universe where gods are eternal and invincible, Leo carries the blood of the one being who defied that rule: the Timeless Assassin, a legend feared by mortals and deities alike.Now, hunted for what he represents and burdened by a legacy he can’t yet comprehend, Leo must forge his path through a deadly labyrinth of enemies, alliances, and cosmic conspiracies—all while piecing together the fragments of his forgotten past.For in the shadows of his fractured identity lies a truth that could shake the heavens themselves.