The fifteenth volume of Kamisama Kiss was originally published in Japan by Hakusensha on February 20th, 2013. It was originally published in English by Viz Media on June 3rd, 2014.
Publisher's Summary[]
Nanami has gone back in time in order to find the fallen kami who cursed Tomoe, but the past is a lot more violent than she expected. Before she can even start her search, she has to deal with suspicious villagers and a mortally wounded Tomoe!