The Ultimate Weapon of the Kingdom, He Went to the Knight Academy as an Inferior Student.

Sinopsis

Ain, a young man from a church orphanage, enrolls in the Knight Academy in the capital. Despite his origins, he is placed in the lowest E-class, often called the "Inferior class," and faces ridicule from aristocratic and honor students. Unbeknownst to most, Ain, also known as "Nameless No.1," is one of the Phantom Knights, the kingdom's most potent weapon, secretly created by the church's covert operations. His true goal at the academy is to make friends, while his identity troubles the principal who is aware of his secret.