Erythr wakes up in a field of red flowers with no memory of who she is. The only thing in the back of her mind is that she's looking for someone, and must meet them no matter what.

Just as she's pondering what to do, a boy around ten years-old named Cobalt chirps that he'll help her if she adopts him.

Using Cobalt's ability to see into the future, Erythr will venture to the center of the October world and discover the Magician trapped there.

[From official website]