Kamisama Hajimemashita: Kako-hen

At her shrine on a quiet snowy day, Nanami Momozono watches in alarm as her fox youkai familiar, Tomoe, suddenly collapses and dark markings spread across his body. The long-missing land god Mikage returns and seals Tomoe inside a magical pocket mirror, hoping to hold back whatever is consuming him.

Mikage reveals the origin of Tomoe’s condition: centuries ago, before the two ever met, Tomoe loved a human woman and struck a bargain with a fallen god to become human. The deal left him cursed and on the brink of death, and Mikage’s quick remedy was to erase the memory of that love. Now the curse has stirred again—triggered by Tomoe’s feelings for his current human master, Nanami. With no clear way to halt it in the present, Nanami chooses to travel far into the past to prevent Tomoe’s fate, even if it risks erasing their relationship, and learns their bond runs deeper than she ever realized.