The protagonist,
Fuka, is a spiritual entity created by the witch Dorothy, but she has lost her memories. The other characters are all magically created. The lion, robot, and scarecrow who accompanied her on her journey (Dorothy turned them into humans) are immortal and trapped in a cycle of reincarnation, unable to leave.
Dorothy, having fulfilled her wish to become a witch, grew lonely and wanted to leave her solitary tower. However, the dog and the tower objected, even transforming into humans to try and stop her, triggering the subsequent events.
After completing the game, I was speechless.
