Haibane Renmei Temporada 1 Episódio 9

Rakka realizes that the crow that died in the well represents someone who cared about her in her old life. The Toga find and rescue her from the well. Hearing a noise, she touches the wall. The Communicator leads her home and they talk about the bird, her wings, and a riddle he calls the Circle of Sin. Arriving home, Rakka becomes ill from having touched the wall.