Fics like The Chivalrous Code of Justain Chamberlain

Justain Chamberlain, a renowned prodigy and heir to the finest line of famed Magic Knights of his kingdom, is appalled when his supreme position is challenged by a loathsome commoner who dares to challenge his place as Griffin-Spine Akademia's top student. Compelled by his ardent dedication to the Magic Knights' code of chivalry, he challenges Reese Hearkley, a gruff, burly farm boy with a massive attitude to a knightly duel...though Justain soon realizes just why this commoner is so absurdly confident in the face of his superiors, and is faced with a trial even the most legendary Knights would struggle to overcome...that is, being spiked by his rivals' obscenely thick, dense, virile jizz and slowly feminized by its magical properties until he's a completely broken cum-junkie!