Magical Sempai is nothing amazing, but nothing terrible. Its the story of a school girl who is very enthusiastic about magic. A new boy reluctantly joins her club and she constantly tries to demonstrate magic tricks to him and constantly fails, leading to a lot of fanservice; panty shots and boob shots. There isn't much of a story. The episodes are 12 minutes with each episode broken down into even smaller pieces. Although the characters are not deep or complex they are all fine. No one is annoying. If you want to watch an anime where a cute clumsy girl tries to do magic tricks and end upaccidentally showing her panties instead then you can watch this.