Kojo Denka no Katei Kyoshi 3 (Fantasia Bunko) [Light Novel]

[Machine Translation] Three months into his studies at the Royal Schools. In addition to his tutoring job, Allen was given a major role as the person in charge of the launch of a joint trading company between the Howard and Leinster dukes. Princess Tina and her family were also busy with their first semester exams. Stella, the next duke of the Howard family and the president of the royal school, has witnessed the rapid growth of her younger sister Tina and her friends, and has lost all confidence in herself...! ... Brother! Stella... A magical revolutionary fantasy in which an unaware and outstandard teacher lights the path of a lost girl and guides her hand!

王立学校に入学して3ヶ月。アレンは、家庭教師業の傍ら、ハワード・リンスター両公爵家による合同商社立ち上げの責任者という大役を任されることに。公女殿下ティナたちもまた前期試験を控え、慌ただしい日々を過ごしていた。そんな中、ハワード家の次期公爵であり、王立学校の生徒会長でもあるステラは、妹であるティナたちの急成長を目の当たりにしたことで、すっかり自信を失ってしまい―!?「...兄さん!ステラが...いなくなったんです」無自覚規格外な教師が、迷える少女の歩む道に灯りを点し、その手を導く魔法革命ファンタジー!