After an episode with too many things going on too fast, now we have an episode with almost nothing going on in the sense of story progress. So we have Chloe already live in Illya’s house now. The next few minutes we have the usual cooking class episode, both girls try to impress their onii-chan.
Then suddenly they are fighting over who becomes the “older” sister. Illya’s attempt to become more like older sister is funny and naive. This episode is closed by Chloe’s request to have her “supply” of mana from Illya. Using “that” method, if you know what I mean.