I was struck by a certain quote in the dubbed dialog: "Your broom is just a tool that clears away gravity" (Akane). Given the common function of a broom - you know, clearing away dirt -, that sounds like a poetically fitting description for its magical use.
I like the idea of Chinatsu deciding to become a witch in training. I hope they'll continue this neat little character arc in the remaining episodes and not simply leave it as an episodic idea.
Truth be told, I'm a bit scared of Akane now. She must have quite a sadistic streak to subject both her sister and her newfound apprentice to the effects of these enchanted... scratch that, cursed snacks. I mean, an hour of non-stop crying or laughing may sound like harmless fun to us as viewers, but I'm sure it'd be quite an unpleasant experience for those who actually have to endure it.