Oukoku no Saishuu Heiki, Rettousei toshite Kishi Gakuin e  

In the Knight Academy of the capital, there was a young man named Ain who enrolled despite coming from a church orphanage and being placed in the lowest class, E class or Inferior class. Despite being ridiculed by aristocrats and honor students, Ain began his school life with a goal of making friends. However, unbeknownst to everyone, including the principal who had been told his identity, Ain was one of the Phantom Knights, the strongest weapon of the kingdom created by the dark side of the church. As he led his Inferior class, Ain was actually working towards overthrowing the aristocrats in a thrilling fantasy tale of the strongest young knight.