"I spent only seven days in the palace of the Dragon King, but here a hundred years have passed." Taro was sad and did not know what to do. Then he remembered the box the princess had given him, forgetting his promise not to open it. As soon as he lifted the lid, white smoke rose from inside and wrapped around his body. His hair turned white, a long white beard grew on his face, his back bent, and Taro became an old man.