zelicofilm

The story centers on a high school girl named Tamahi, who encounters strange creatures while navigating a gigantic apartment building.

College student Rin and high-school student Tamahi investigate the secrets hidden in a vintage apartment building that has been the subject of rumors of psychic phenomena and strange deaths.

"Calabi-Yau" refers to the "six-dimensional world" (Calabi-Yau manifold) that humans cannot perceive.