Nanami Momozono, the land deity, is playing in the snow at her shrine one day when her familiar, the fox youkai Tomoe, collapses, with dark marks developing on his body. Lord Mikage, Tomoe's old lord, reappears after a lengthy absence and places Tomoe in a magical pocket mirror to cure him. Mikage reveals that the fox youkai was in love with a human lady long before he and Tomoe met. Seeking to live as a human with his loves, he struck a bargain with a fallen deity, but he was cursed and died as a result. As a fast solution, when Mikage discovered Tomoe, the god made the youkai forget his human love. However, something has lately occurred that has reactivated the curse.