OVA: Wall Sina, Goodbye, Part 1

On the day before the 57th Exterior Scouting Mission, Hitch gives Annie Leonhart the task of finding a missing person, Carly Stratmann, the daughter of a wealthy merchant in Stohess District. She visits the Stratmann family mansion to ask Carly's father, Elliot G. Stratmann, about the circumstances that may be related to her disappearance.