From the Slums to SSS-Rank Savior

Leon, an orphan from the slums, is desperate to save his sister, whose leg was crushed. He unexpectedly becomes bound to the Abyssal Overlord System and awakens the legendary SSS-rank ability, Lord's Flame. During the academy's ability-ranking test, Caleb, who has awakened an A-rank fire ability, teams up with the snobbish principal to get Leon expelled for good. With the odds stacked against him, Leon proposes a wager: the loser must kneel. As the entire school looks down on him, he crushes the supposedly indestructible testing crystal with one hand, unleashing a torrent of black flames. Elena Rothschild, a powerful heiress, boldly steps in to defend him, drawing the attention of humanity's mightiest warrior, who is fighting demons on the front lines. After transferring to Nova Academy, Leon devours a three-headed hellhound during the City Combat League and unlocks the Abyssal Legion. He continues to shatter class barriers, eventually heading to New York to face Damien Morningstar, the new King of the Abyss, who has possessed the school's bully, Caleb. Transforming into a hundred-meter-tall fire giant, Leon fights to protect humanity.

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