Yami is sixteen and lives on Sorashima, an island where the line between reality and mystery blurs. Between school and her part-time job at a convenience store, she carries a secret duty: to protect the island’s residents from a dark and unknown threat that seems intertwined with a hidden past.
The night of the Star Festival has finally arrived, and while Ryu and Haruka meet again after years, Yami and Kijo encounter for the first time the skeleton that haunts the island...