DxD: Scion of Lucifuge Novel

Roy finds himself transmigrated into the world of High School DxD as a member of the prestigious Lucifuge family, with his strict and devoted older sister Grayfia by his side. What initially seems like a life of luxury and destined greatness quickly becomes a harsh reality. Despite possessing the prestigious family name, Roy lacks demonic talent and, after years of grueling training, remains trapped at Low-Class Devil status while his peers advance to High-Class with ease. Subjected to endless ridicule and trapped in a cycle of relentless sword practice, Roy refuses to accept his mediocre fate. Determined to prove himself, he commits to ten thousand sword swings daily in relentless pursuit of strength. His perseverance finally pays off when the Strongest Demon King System suddenly activates, granting him access to powerful new functions. Armed with this system, Roy begins his journey across multiple worlds including High School of the Dead, Demon Slayer, Akame Ga Kill, and Bladedance of Elementalers, embarking on an adventure that will transform his destiny.