Riku is back to the isolated island where he was born and grown up. His parents passed away in a ferryboat accident when he was a kid and he was put in an orphanage. He meets Nanase and Kazusa, his old friends, and he temporarily stays at Nanase's house. He meets Toko, president of the local history club, and Sayaka, a mysterious girl. He gradually gets to know various secrets of the island as he talks with them....

[Edited from ErogeShop]