Ashita no Kimi to Au Tame ni

An island encircled in all directions by the blue sea, Mikazejima. At its heart, a great, deep forest stretches out, which people are forbidden to approach. When he was a child, Yashiro Shuuji lived on Mikazejima. Although he currently lives in the city, he wants to go back to the island someday. One day, a letter comes from his cousin, Mikaze Rika, inviting him to transfer to Suzumori Acadamy, her place of work. Without having to be asked, Shuuji decides to return to the island. Little happenings when visiting a nostalgic place for the first time in a long while, and an unexpected reunion. Though it's a bit different that Shuuji imagined, the scene he desired indeed existed there. Even though school life is relentless here at the famous preparatory school, Suzumori Acadamy, cheerful laughter can always be heard. Yashiro Shuuji's new daily life, this is how it begins— And, as time goes by, he will recall one thing. Mikazejima — that was the place where the gods were last witnessed in this world.

[Edited from TLWiki]