Ein was born with a super rare skill, but it’s not enough to keep him from being cast aside by his father. He takes refuge in his grandfather’s kingdom...where he immediately becomes the crown prince! And that’s just the start of his journey!

It’s the golden age for treasure hunters—those who risk their lives in treasure vaults the world over, hungry for glory. Krai and his friends swore to become the greatest of them all, but there’s just one problem: this grieving soul wants to retire!