I'm going back to the sinister Shironagasu Island... A mystery adventure game and a visual novel set on solitary Shironagasu Island. Explore the island and discover its sinister secrets as detective Sen Ikeda and your assistant Neneko Izumozaki. Sen Ikeda, a detective in New York, receives a mysterious invitation to Shironagasu Island in the testament of a millionaire. Together with Neneko Izumozaki, a girl with special abilities, he travels to the secluded island. Solve numerous mysteries and murders! Meet enigmatic and captivating characters! Discover the hidden secret of Shironagasu Island! Stay alive and escape from the ominous island!