Haruka Kaminogi’s plan to spend summer break goofing off with her friends gets derailed when she begins having visions of blue snow and strange figures.

Haruka is taken to La'cryma. She managed to escape and mix herself up with the residents at the local town. When she reaches the surface, she notices many similar things related to her world.

Haruka deals with the concept of forgetting, as her memories of her grandmother are disappearing, and an old friend she had in Tokyo is unable to recognize her.