Kaguya
Based on "The Tale of the Bamboo Cutter", this manga takes place around the mysterious Kabuchi Island where children were raised in an orphanage as sacrificial victims. Some of the children manage to leave the island and think they have escaped their fates. But then they all start to die at age sixteen, in the order and at the time they were originally arranged to be sacrificed. The only way to stop the deaths is to return to the island, seek out the cause – Kaguya Hime – and destroy it.