Shinsekai Yori ED 1
“Wareta Ringo (割れたリンゴ)” by Saki Watanabe (Risa Taneda)
used as ED for episodes 1 -16.
It is worth mentioning that this anime does not have an opening. Therefore, the ending becomes very important in that it is the only source of music (with lyric) for the entire show. In that regard, it does not disappoint, especially because it is always enjoyable when a voice actor of main cast is the lead singer.
Although, the shining point of this song is its catchy, electro intro. During the episodes where this ED is used, part of what kept me going is because I want to hear the ending one more time.