Yozakura Quartet, Volume 27 (Yozakura Quartet #153-157)

To arm themselves for the final battle against the death god Oushuu, Akina and co. pay a visit to the Ise Grand Shrine to beseech the help of elder god Izanami-no-Mikoto, who instructs them to forge a new set of sacred treasures blessed with her own divine power. The catch is, these neo-jingi must be made by combining the powers of humans and demons. Whatever that means...