: Departures specifically digs into the past traumas of Basara, Yuki, and Kurumi regarding the Hero Village, setting a darker tone for what comes next.
You can find the complete collection, including the OVAs, on platforms like Crunchyroll or in Blu-ray sets from retailers like Target and FYE. Shinmai Maou no Testament - Hexa Blog Shinmai Maou no Testament OVA
While the series is known for its high-octane ecchi content—even featuring what some call a "full-on orgy" in the later OVA—the specials actually do some heavy lifting for the characters: : Departures specifically digs into the past traumas