In the world of One Piece, Kahn obtained the Book of Sin, which allows him to capture sinful people and absorb their sin points to aid his training. Akainu has over a million sin points; I really want to capture him, but I can't beat him now. I'll join him first and let him work for me. Once I'm strong enough, I'll capture Akainu. Ten years later. "Empress, you want to seduce me? You're kidding! I'm only thinking about your sin points. Your seduction won't work on me. Lie down and be sealed away obediently." Twenty years later. "Nami, you're still trying to be cute with me? No way! Wait until I capture you, then you can be cute..."