As the eldest son of the baron, the baron used all of his limited resources to send him to the academy. However, it took him a long time to graduate because of their lack of connections and resources. Although he is a very talented man and has excellent combat skills, the baron's son was left behind by the wealthier nobles of the same age as him.
Normal graduates should finish school around 18 years old. Luther graduated recently at age 25.
Even though his professor and his friend keep telling him that graduating late doesn't mean failure, he still can't help but feel disappointed in himself. His disappointment increased when no one came to sponsor or hire him even though he had already graduated. But that doesn't mean he had given up.