DxD: Scion of Lucifuge Novel

Roy's arrival in the High School DxD universe promised luxury and power befitting his status. As a proud member of the prestigious Lucifuge family—with Grayfia serving as his exacting, loyal sister—Roy anticipated a path to greatness. 99,997... 99,998... 99,999... 100,000!!

Reality, however, proved merciless. Born without exceptional demonic talent, Roy found himself trapped as a Low-Class Devil while his peers advanced rapidly. Locked in an endless cycle of sword drills and scorn, he watched opportunity slip away from countless rivals. Determined to defy his circumstances, Roy committed to relentless discipline: ten thousand sword strikes daily, pushing through doubt and exhaustion.

Until the turning point arrived...

[Ding! The Strongest Demon King System has been activated. Access functions to learn more.]

Now armed with transformative power, Roy stands ready to shatter expectations and claim his destined glory.

---- High School DxD - Main World!
1 - High School of the Dead [●] - First - World Traveled
2 - Demon Slayer [●] - Second - World Traveled
3 - Akame Ga Kill [●] - Third - World Traveled
4 - Bladedance of Elementalers [●] - Fourth - World Traveled
5 - ???