Story
Side Story One: Eustachius's Incognito Operation Downtown The head priest wants more information on Myne, and so he sends two of his aides, Eckhart and Justus, to investigate her. Side Story Two: Visiting Missus Corinna Effa and Tuuli find themselves having to accompany Myne to Corinna's residence, because she wants to take a look at the outfit Myne wore for her baptism. Note: This two-part OVA was bundled with Part 5 Volume 1 of the LN.
Synopsis via AniList (English).