Pure intentions prove to be the ultimate weapon. Kiyoshi, now the rightful bearer of the legendary Excalibur, is accelerating toward his dream of becoming the supreme exorcist. His path leads to the brutal Sub-Class Certification Exam, a battlefield crawling with malevolent spirits and treacherous examiners. Amidst the chaos, his unwavering, almost absurd sincerity begins to cleanse the very darkness he faces. His reunion with the enigmatic rival, Soukai Hitsugi, plunges him into deeper turmoil. This is a story of righteous fury and laughter, marking his first true stride toward the pinnacle of power.