Sphere

Kasugano Haruka and his twin sister Sora have lost both their parents in an accident, and with them all their support. They decide to move out of the city to the rural town of Okukozome, where they once spent summers with their late grandfather. At first everything seems familiar and peaceful, but then things start to change as Haruka starts to remember his youth. Source: ANN

The story is set in the distant mountain village of Okukozome-chou. Kasugano Haruka and his twin sister Sora have fond childhood memories of going to the village to visit their grandfather during their summer vacations. However, after losing their parents in an accident, the two must move in with their grandfather. The twins get reacquainted with their old childhood friend…