I enjoyed it, but it's probably too lightweight for full-length episodes. Making it half-length was a good move. It stars a schoolgirl with big boobs who loves doing conjuring tricks, but is rubbish at them.
...and that's about it, really.
The first five episodes couldn't be simpler. Sempai tries to perform magic for her Assistant, who's a reluctant member of the school magic club and mostly wants to do nothing and play video games. He thinks Sempai's sexy, but an idiot. (He's not wrong.) Nonetheless, she's fairly endearing, due to her unstoppable, madly optimistic determination to keep showing off how wonderful her magic is in the face of all the evidence. (In fairness, though, her problems are due to stage fright and she's actually competent when she's not being watched.)
Occasionally we meet Sempai's equally dozy sister, who's a teacher at their school. There's also Madara-san, a girl in the Chemistry Club next door who can do magician-like tricks with science and thinks the Magic Club is a den of degenerates. (Sempai's so fixated on stage magic that she's almost oblivious to panty shots and innuendo.) Basically, though, it's about our two heroes. In ep.6, though, Saki-chan and Masashi-kun show up. (They're in the title sequence, so we've been waiting for them.) They're into street performance, which can save Sempai's bacon because now there's someone to rescue her performance disasters. Saki's a gyaru who's a bit too devoted to her brother, Masashi, even though he's unenthusiastic about most things and almost spherical. This doesn't change the show significantly, but at least the bigger cast shakes things up a little.
Is this a great show? Obviously not. It's light and disposable, but also modestly amusing in its fanservicey way. It's also educational. Every magic trick gets explained, which even extends to the chemistry tricks and how to make balloon animals. (The latter's so simple that it wouldn't have occurred to me that there could be anything to explain, but this assumption is wrong.)
I liked it. If nothing else, I'm pleased that Masashi-kun doesn't have a Shit Actor's Fat Voice. It's good for a laugh.