With an inexplicable transfer notice, Zhou Yuanwan and three roommates in the dormitory were forcibly sent to a taboo high school without a map. The four of them lived on the top floor balcony. Guided by mysterious clues, you explore the campus and accumulate enough points to return home, when a cruel deal is whispered in your mind: give up all the points, and your best friend and two roommates can return to the real world safely. She resolutely gave up her return journey, watched her friends leave, and was trapped alone in the strange school building where the living ghosts were kept. While avoiding the fate of being sacrificed, she dug deep into the secrets of the campus' origins and found the only way out of the situation.
