Jin and Ju-long were living ordinary lives in an orphanage until their tenth birthday: They received a letter from an elite magical school which specializes in all aspects of magic. A little unknown fact about this magical school named Unicus: None of the staff or the students who attend are purely human.

Everyone who made fun of Jin’s appearance deeply regrets it when Jin’s true appearance was shown when he turned sixteen years old.

Jin: You are a dragon and I'm a fairy. You do not look shocked at all.
Ju-long: .....
Jin: Oh wait perhaps you are shocked to the point of being speechless.

Slowly, but surely they grow up. However no matter what they are always together.