A human girl and a demon boy, the two fell madly in love with each other, the girl was willing to show her her world and the boy was willing to stop being a demon to be by her side. But the girl's village ended up sealing the boy away so he wouldn't see her again.

A century later, her great-granddaughter arrived at the temple on an expedition and while she was admiring the cover of the wall where the demon boy's box is located, she touched it, which caused a magical reaction to free him.