The ancient book of Uiji

One God, and Two Goddesses swore to protect a book that contained their power.
The book they call "carte rea" was stolen by a human man, named Morimoto Hisashi.
As the book was taken from it's rightful owners, the Deities soon began burning into ashes.

Months after stealing the book,

Morimoto had a child with his wife whose name was Kumagai Hisashi.
They both decided on the name Kon, as they thought Kon was a boy.
Kon grew up, and she notices her father always locked the door to his office room.
One day, she saw the door was unlocked, she decided to have a peek, and saw
the book. "Carte Rea" She's heard of the legends, she knows it might be fake, but she goes on an adventure
to return it back, back to the right place.