The OVA is an adaptation of the prequel light novel of the same name, which was originally a bonus for the first Blu-ray volume of the anime series.
: Her peaceful but lonely existence is disrupted when Melakuera , the Great Spirit of Fire, arrives to judge and eradicate her. Melakuera views "witches" as calamities that must be destroyed before their power fully awakens. Re:Zero kara Hajimeru Isekai Seikatsu - Hyouket...
: The OVA culminates in a battle that leads to the official formation of the magical contract between Emilia and Puck, cementing their bond as girl and spirit. Production & Release The OVA is an adaptation of the prequel