Ryuuhime to Taida na Metsu Ryuu Kishi: Osananajimi-tachi ga Yuushuu na no de Mendou na Ken

A boy named Regulus possesses immense power but keeps it hidden, appearing lazy to those around him in a secluded village. He intentionally fails a test to become a dragon knight because he finds the process troublesome. Despite this, he is taken to a school that trains dragon knights by three childhood friends who care for him. Upon reaching the royal capital where the school is located, they anticipate their new lives, but are soon attacked by a ruthless group that misuses dragon power. To safeguard those he cares about, Regulus unleashes his concealed abilities in a moment of dire need.