Dungeons are appearing all over the Earth. The skies are darkening as the dungeons emit more and more blackness that threatens to block out the sun entirely. Humanity is scrambling. Slayers race to close every dungeon that appears. Slayers were once normal people, but they have become special. At age 16, Rebirth unlocked their inner potential.Tad Harrington is an unlikely hero, and yet, the morning of his Rebirth has arrived. Bullied relentlessly in life and at school, he looks to his rebirth with both hope and dread in equal measures. His whole life could change in an instant - he could be gifted with fame, money, and power...Only one fact stands in his way - 99% of Rebirths are duds.And he's never been that lucky.He is right about one thing: his whole life is about to change, though not in the way he expects. In a world where everyone else has power gifted to them, Tad gains a unique ability that allows him to level up. He will have to climb through all the ranks, earning every shred of strength he can grasp, or die trying.

King Grey once benefited from unrivaled strength, wealth, and prestige in a world governed by martial ability, but now finds himself reborn in a society dominated by magic. Given a second chance at life, the once-king strives to understand his role in this new world and the purpose of his reincarnation while correcting the mistakes of his past.