Yosuga no Sora

Twins Haruka and Sora are going back to their grandparents' house. The two remember their many visits to the house when they were kids. A little while ago, they lost their parents in a car accident, ultimately prompting them to move to their grandparents' house far out in the country. Nao, their old friend, Ryouhei, Haruka's classmate, Akira, a miko at a neighboring shrine, Kazuha, Akira's close friend, and Kozue, the class rep, welcome them. Nothing has changed. Good memories and a silent atmosphere help to heal the sadness. However, their peaceful life gradually changes. A secret promise made a long time ago. A lost treasure. The real reason for moving to the village. Feelings long kept a secret. Their story now starts under the summer sun…