Description: After his father's funeral, the protagonist receives a real estate rights transfer certificate for a building called "The Origin" sent by an unknown person. "Adam, do you want to come up to the 11th floor?" Upon seeing a note with his name, waiting on the 11th floor, the protagonist heads towards that unfamiliar building. A horror, mystery, and adventure game where the objective is to reach the 11th floor of a building that doesn't have 11 floors.