This space is at the top of the Corridor part of the New Building.
- In the Original ver, this place is on the 3rd floor. And there is filled with water because of the unusual phenomenon.
- In the Original ver, there is hear the croaks of frogs until acquire the Water Token.
- In the Remake ver, This place is on the 4th floor. And there is a Swimming Pool.
- In the Original ver, a Water Demon appears in this place and In the Remake ver, a Mermaid appears in this place.