Dendera

the long version

"When Kayu Saito wakes up, she is in an unfamiliar place. Taken to a snowy mountainside, she was left there by her family and her village according to the tradition of sacrificing the lives of the elderly for the benefit of the young. Kayu was supposed to have passed quickly into the afterlife. Instead, she finds herself in Dendera, a utopian community built over decades by old women who were abandoned like her. Together, they must now face a new threat: a savage bear who, like them, is female and hungry"--