Yushihiro is a university student. During his vacation, his old fashioned parents decide to send him to their home city in order to find a fiancee.
He goes to spend some days in the house of his mother's cousin in order to meet some girls to decide wich one will he marry.
Visiting an old xinto shrine of the city, he met Rie, a strange girl who is actually a childhood friend. And she wants to become his fiancee too, even thought she is not even human!