I literally just finished watching an anime OVA that was about 25 minutes long called "Little Witch Academia".
Sounds like a little kid thing, right? It's not really, I'd say it caters more towards pre-teens.
Akko fell in love with magic ever since her childhood days. Aspiring to become a witch like the one she saw at a magic show, Akko enrolls in Luna Nova - a prestigious witch academy. Contrary to Akko's expectations, the class is unexpectedly boring. Then one fateful day, something unthinkable happens. The academy faces a huge crisis and is at the brink of destruction. Now it is up to Akko and her friends to save the day!
I enjoyed it. The characters were likable, the animation was awesome, and I've had quite a craving for a magic academy anime for a while lol.
I honestly don't have anything bad to say about it. Quite a bit of people have been saying that it should be turned into a full fledged anime movie, or an anime TV series. I have to agree, it was just too good not to do something else with. They opened up a nice story that I think a lot of people would enjoy and immerse themselves in.
Watch it, trust me, you'll enjoy it!