Yakata Nightmare Project

Story

A young man named Yukiya goes on a yacht travel together with a few friends. Suddenly, a terrible storm comes out of nowhere: Yukiya is washed out on the shore. He regains consciousness, but not memories of recent events. Realizing that he is on an island, he begins to explore it and reaches a big mansion. To his surprise, his friends are already there; apparently, they have all been invited. Thinking that the worst is behind, Yukiya goes to sleep. But the next day, the young and beautiful owner of the mansion, Chiori Nakamura, is found dead in a locked room. One of Yukiya's companions reveal...