Blade, an aspiring holy knight, diligently endures the rigorous training required to achieve his dream, alongside his mischievous friends and three saintess candidates: Iris, China, and Theresia. His ultimate goal is to become a revered knight paired with a saintess—a partnership bound by an unbreakable rule: Only upon receiving the Church’s formal recognition as a saintess’s partner may the bond be officially consummated. Any violation, such as forming an unapproved bond, results in the knight being stripped of their powers and expelled. One fateful morning, Blade awakens to find a holy mark etched on his lower abdomen, signifying that he has been paired with a saintess. However, he has no memory of how this happened or with whom. Among the candidates, Iris, China, and Theresia are the only likely possibilities. Now, Blade must navigate a delicate balance—uncovering the truth behind the mysterious bond while keeping the mark a secret. Will he succeed in identifying his destined partner without jeopardizing his future as a holy knight? A thrilling romantic mystery unfolds, blending intrigue, friendship, and the high stakes of sacred knighthood!