Vatican Kiseki Chousakan: Majo no Soup  

バチカン奇跡調査官 魔女のスープ, Vatican Miracle Examiner Special, Vatican Miracle Examiner OVA, Vatican Kiseki Chousakan Special, Vatican Kiseki Chousakan OVA, Vatican Kiseki Chousakan (2018), バチカン奇跡調査官 (2018)

The flyer from this years AnimeJapan 2017 event revealed that Vatican Kiseki Chousakan will receive an OVA episode.(Source: ANN)