Dane Harper escapes his suffocating 9-to-9 existence through visual novels, consuming everything from anime to light novels. His true passion: Harem, Dragons, and Deities (HDXD), a legendary fantasy visual novel he's devoted nearly 7,000 hours to mastering. He's chased every ending, obsessed with the [Overlord of Humanity Ending] where the protagonist builds an empire of powerful women across the HDXD universe. When a cosmic accident orchestrated by the mischievous witch-in-training Beatrice annihilates humanity, everything changes. As the first soul offered reincarnation, Dane receives two precious gifts: a world of his choice and a fragment of Beatrice's power. He selects HDXD itself and an extraordinary ability perfectly suited to his goals: the Omni Harem System. This legendary system grants him leveling mechanics, unique powers, and guidance for assembling the ultimate harem. Reborn as an obscure extra in the game-world he knows intimately, Dane possesses an unprecedented advantage: complete knowledge of HDXD's mechanics and secrets. His mission is audacious—surpass the original protagonist and claim his rightful place as the universe's dominant force. Yet knowledge alone won't shield him from HDXD's lethal complexities. Dragons and deities roam freely, capable personalities surround him, and catastrophic wrong choices lead to nightmarish endings. The path to becoming Overlord of Humanity demands unwavering determination, tactical brilliance, and the resolve to outlast every obstacle. Dane Harper will seize his destiny. No matter the cost, he's destined for that ending.