Hōzuki Island

Hōzuki Island (鬼燈の島, Hōzuki no Shima) is a manga written and illustrated by Kei Sanbe. It was serialized in Square Enix bi-monthly seinen magazine Young Gangan, commencing in the first issue of 2008 and running for 27 chapters through issue 14 of 2009, to July 3, 2009.

Plot
Two children are sent to live on a basically deserted island. Deserted except for a few other kids and teachers. Suzuhara Kokoro and his blind little sister, Yume find that all is not as it seems as they learn more from the other kids and witness the teachers' actions.