Nai has always loved fantasy books. Satisfied with her newest find in the school library, she starts reading the book the very same evening. But when she wakes up the next morning, her home is nowhere to be seen-instead, she finds herself in the kingdom of Ydillia, much like the one she read about the night before. As a reader, she is thrilled to meet all of the book characters for herself, but as an ordinary girl, she is terrified of the new world she wound up in. But the charming Ydillia seems to have its fair share of secrets. Unbeknownst to everyone, a voice keeps calling out to Nai-the voice of a goddess forgotten by time itself. And if she wants to return home, Nai will have to find her, no matter what.