Histoire
A 4 episode OVA series. Every episode will involve different side stories from the original source material. Episode 1 - Reshuffle: Due to the effect of Friagne's treasure device, the bodies of Shana and Yuji are swapped. They try to overcome the situation secretly, but... Episode 2 - Domicile: Recently, Shana has been acting strangely. Worried about her well-being, Yuji and Wilhelmina decide to follow her from the shadows after school one day. What secret could Shana be hiding?
Synopsis via AniList (en anglais).