Shinsouban Mahoutsukai to Goshujin-sama

You are a princess in a kingdom where magic is the foundation of everything—law, trade, culture, daily life. Everyone in the kingdom can use magic. You cannot. To address this, the court sends you to the nation's most prestigious magical academy. You have twenty-five weeks to select one student from the academy as your personal servant. If you fail to make a choice in that time, your status as princess is forfeited.