Playing Sister

In the distant future, Kagami Village is a quiet mountain town left behind by the rapid advancements of urban technology. A local legend warns, "If you're not well behaved, a look-alike will come." Higure Akane, a middle schooler living in the village, eagerly awaits the return of her older sister, Higure Sui, who has just been released from the hospital after a year away. But soon after Sui comes home, Akane gets a chilling phone call: "The person in that house is not your older sister."