Synopsis. The main character, Yoi, receives a letter from his dead sister, Chitose, saying that she wants to tell him a secret. In order to find out the truth, Yoyi heads to an abandoned laboratory. Outline 2D exploration adventure While being chased by mysterious characters, the player must guide the two characters and use items to solve gimmicks and reach the location written in the letter. Game Features 2D exploratory adventure Set in a modern abandoned hospital with pixel art A puzzle-solving element in which players solve gimmicks while being chased by pursuers Tense atmosphere of stealth with the accompanying characters. Newly written music for the game.