No One Knows (Yu-Gi-Oh!/Bakura)

He said, I'm going away for a while. He said, This lord will be back soon. He said, Don't make such an ugly face. He said, Wait for me. So the boy smiled. "Okay." Later, he thought that believing in a promise from a Thief King who lived by stealing and deceiving might truly have been too naive. But because he was naive, he believed, even if no one else knew... Theme: