Kiniro no Corda, Yume-iro Pâtissière Recommendations
Enter magic fairy to turn the heroine into the best of the best. Plus more yummy guys the she knows what to do with.
both stories have fairies that appear in school (but la corda d'oro faries was not that much of importance compare to the other 1), it somewhat similar in the way the story set, start out suck but better by time! try it out!
Both have a girl who attends a school that revolves around skills (one is music, the other is cooking). Both of the founders for the schools had a relationship with a fairy, and so there is a big statue of the fairy at the front of the school. The girl meets a fairy and at first is a bit shocked (Kahoko from Kin. no Corda more so) but then gradually builds a friendship and trust with them. The fairies help the girl with a skill that they are absolutely terrible at, but then the girl slowly get better and can do things on her own.