You play as Makoto, a student who never attends the lectures at the school. As a punishment, you have to attend an extra seminar on an island with other classmates. However, when you arrive on the island, strange things start happening. A girl is found dead on April 6th, with a small bell in her hand. Immediately after that, you found yourself in the bed and see the date – April 1st! Was the vision of the girl just a dream, or do you possess a power to predict events? This is what you will have to find out, as a series of strange deaths make your seminar much more suspenseful than you have thought.