According to Kodansha, an OVA of light novel "Ark IX
" was announced to be released on July 2nd. The blu-ray will be bundled with the second volume of the novel.
Ark IX official website
The world has been divided into two halves by a giant wall to prevent the epidemic of "Dark mist". In order to shelter the refugees, artificial cities called "Arks" were built. Shido Enishi is a private detective, who works at the ninth Ark. One day, he is asked to capture a burglar. The seemingly simple case leads him to a great conspiracy.