According to the cover note of the 17th volume of the comic book, a new OVA of Kami nomi zo Shiru Sekai
was announced. Ayukawa Tenri's arc will be animated in the OVA. It will be released on October 18th along with the 19th volume.
Source: Scan of the announcement
Kami nomi zo Shiru Sekai: Tenri-hen