A guy stuck in domestic limbo with two versions of the same girl, neither of them actually his wife, and the show treats it like a genuine problem instead of a punchline. The comedy lives in the exhaustion of just trying to keep two Valkyries fed and happy while nobody's timeline makes sense. Romance doesn't move forward here, it just pools around him like water finding its level, patient and warm.

The strange and magical events of the previous season have left Kazuto with not one but two Valkyries. One is a princess in her teens and the other is a princess in the form of a child, and he now lives with both of them and takes care of them. Through all of this, he and Valkyrie still have not gotten married. The OVA runs two episodes and mixes comedy, romance and science fiction.