Ore to Kanojo ga Geboku de Dorei de Shuujuu Keiyaku

In a world where beasts cause destruction, individuals known as Hexenritter use magic to summon servants to combat them. An academy trains these individuals, most of whom are girls. Shirley, a student from a once-prominent noble family now in decline, is isolated by her background. After several attempts, she successfully summons a servant named Hayato, a boy with no memory. Shirley's goal is to win a tournament that awards the title of Grantzveissen, which could restore some of her family's lost prestige. To qualify, she must perform well in battles organized by the school.