Nacked eye is a story of a japanese school girl who lives in an old monastery with her grandfather.
One day she stumbles upon a set of old handwritten talismans and a box while cleaning. And as a true curious person she opens a box and her spirit gets transported to a spirit world filled with ghosts, yokai, and other strange creatures.
She meets a blue butterfly samurai that agrees to help her in her journey, while other characters try to steal and eat her soul.