Stream anime episodes online for free, Watch Darker Than Black Episode 13 English version online and free episodes. Anime Episode guide, Chapter Darker Than Black Episode 13 English dubbed A Heart Unswaying on the Water’s Surface.. Many years ago Yin, also called Kirsi, is playing the piano under the watch of her teacher, Eelis Kastinen. In the present, Yin has apparently run away. Kurasawa and Kiko are asked by Kastinen to look for Yin.