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Kaito was never meant for an ordinary life. From a young age, he lived as a world-famous ''''Nutuber,'''' chasing adrenaline and undiscovered places. But his luck ran out on a peak he couldn''''t conquer, dying with a heart full of regret.Fate, however, had one more journey in mind.Reincarnated into Caelum, a world of soaring kingdoms and terrifying magic, Kaito is born as Elian but as a ''''Hollow.'''' In a world where power is measured by the mana/aura you consume, he is a vessel with nothing inside—a defect sold into slavery for ten gold coins.From a modern adventurer to a shackled Sapper in the Lawless Zone, Elian''''s journey seems over before it begins. But the world doesn''''t know what he carries.Accompany Elian as he turns the world of Caelum into his ultimate playground.