Rebirth of a Billionaire Heir - Chapter 17 - : The Unseen Enemy

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)

-Daughter? Yes!-Multiple worlds? Yes!-Vast Lore? Yes!-Fastpace? Yes!...“You either Die a Villain or Live long enough to see yourself as a Hero.” ~Probably Spark---------------------------------------Spark, the lofty young master of the Dwight family, had always been a mystery. His true abilities were never known until the day he stepped onto the frontlines.In one awe-inspiring exhibition of power, Spark shocked the world and sent the coalition army of the five emperors into a chaotic retreat.Now, with the eyes of the world on him, each faction lusted to uncover the secrets behind his unparalleled strength.Still, in spite of the rampant curiosity and greed, nobody had the guts to confront him directly.And with every rumor spread of his feats, a question burned in every mind: was Spark this powerful all this time, or was he casting an illusion of strength before everybody's eyes?

In a world fractured by conflict and haunted by shadows of the past, Kokushibo—the first Upper Moon demon—meets his end, only to awaken in a new life. Reincarnated as Crimson, a child born into a different family, he carries the memories of a past he cannot escape. Burdened by centuries of guilt yet indifferent to the present, he resigns himself to duty—until an unexpected bond with his newfound family begins to thaw his hardened heart. As he struggles between the weight of his past and the weight of the new life, Crimson must decide whether he will remain shackled to his former sins or embrace the possibility of peace.