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My Demonic Kingdom. by Nickbuckhart32
Fandoms: D.Gray-man (Anime & Manga), 七つの大罪 - 鈴木央 | Nanatsu no Taizai | The Seven Deadly Sins - Suzuki Nakaba (Anime & Manga), 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga), ありふれた職業で世界最強 | Arifureta: From Commonplace to World's Strongest (Anime), Soul Eater (Anime & Manga), 異世界はスマートフォンとともに | Isekai wa Smartphone to Tomo ni | In Another World With My Smartphone (Anime), ソードアート・オンライン - 川原礫 | Sword Art Online - Kawahara Reki
26 Jun 2025
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Summary
Izuku Midoriya is unexpectedly contacted by his father, a man who had been absent his entire life. But this encounter, far from being a simple farewell, reveals a secret capable of shattering everything Izuku thought he knew: the dying man claims he was once a dethroned demon king from a parallel dimension… and warns that a corrupt god—whom he once served—and his clan are planning to invade their world, starting with Japan, intending to unleash a plague that would wipe out humanity as punishment for betraying them.
Before drawing his final breath, the former monarch awakens a dormant demonic legacy within Izuku’s blood—a dark power that demands a piece of his humanity in return. Forced to accept abilities he barely understands, Izuku ventures into an unknown world, hoping to stop the threat before it crosses over into his own.
As monstrous creatures begin to rise and the boundaries between worlds blur, the young hero must learn to live with his new nature as the newly crowned Demon King… all while reluctantly facing his forced enrollment at U.A. Academy and trying to maintain the illusion of a normal school life.