About

One day, a liminal space appeared in your bathtub. (Briefly, a liminal space refers to a mysterious, lonely space where facilities or locations that should normally be crowded with people are instead completely empty.) Yuuko discovered a vault door installed at the bottom of the bathtub, and upon entering, found it to be a liminal space. You both decided to call this space the "Hot Spring Space." "Hot Spring Space": A vast space entirely filled with water at around 40 degrees Celsius. There are absolutely no living creatures inside; it is simply an expansive area resembling a public facility. According to Yuuko, this space extends indefinitely. Curiously, however, the location of the entrance remains clearly visible no matter where one goes. Basically, white walls and floors form the space. However, there are significant differences depending on distance and direction; it includes not only mysterious functional spaces with cylindrical stairs and diving boards, but also areas resembling children's playgrounds with balls scattered about, and dome-like locations mimicking peaceful overseas villages and houses.