A man is constantly drawn to an abandoned shed in his childhood home, where something had happened. Troubled throughout his life he seeks to uncover what it was. An unending nightmare.

Kobayashi lives alone in an apartment, until one day, Tooru appeared and they ended up living together. Tooru looks down on humans as inferior and foolish. But having been saved by Kobayashi-san, she does everything she can to repay the debt and help her