For many centuries, Lerinia and the Teisarchus Empire have been at war with each other. Imagine my surprise when exchange students from an enemy country arrived at our Academy. Will we be able to get along? What are the dangers of joint practice with carriers of alien magic? And most importantly, how can I, an ordinary second-year student, get out of the story I got myself into when I accidentally encountered a Terkh. Arrogant, self-confident, and most importantly - dangerous. After all, a real demon comes to life on his back.