Somewhere in Japan... there is an island called Aoshima, which has a beautiful nature. You come to the island to do energy research. However, a series of mysterious deaths has occurred since extra-hydrate, or XH, was found in the island. What's going on in the island? What are other workers' real identities? And their real purposes are...? Will you all be able to leave the island safely?
Answers apply to both the paid and free apps. Checkpoints are for free apps only. The answers are underlined.