Keywords: "love", "adventure", "master" and "familiar". High school student Saito Hiraga, who was summoned as a "familiar" in the other world of Halkenia, was involved in a fantasy romance adventure full of these four elements. The one who summoned Saito to the other world was the cute master, Louise, who had no magical talent at all. Facing the mysterious beautiful girl who suddenly appeared, Saito, full of doubts, was suddenly kissed after listening to her talk about the contract... After that, incredible words appeared on the back of his hand, and Saito inexplicably became Louise's familiar... Set on the full-boarding Toristine Magic Academy, the beautiful master magician Louise and her familiar Saito began a school life full of courage and humiliation in quarrels, reproaches, and love... In the turbulent exchanges in the other world, what will be the fate of Louise and Saito?