Ankoku Kishi no Ore Desu ga Saikyou no Paladin wo Mezashimasu

Kai is a young Dark Knight from a family of high-ranking Dark-job users who seeks even greater power. After rescuing the Princess from a monster attack, he is invited to join an academy that trains Holy-job specialists. At the academy, he is joined by Millia, his childhood friend and a Paladin, Chloe, his sister who is a Necromancer, and Princess Shel, who becomes his instructor. Despite his body being unsuited for Holy magic, often causing him to nearly faint when using it, Kai remains determined to overcome these challenges. His goal is to become the kingdom's strongest Royal Paladin, the direct opposite of the most powerful Dark Knight.