Introduction: In a world where demons rise from hell to ravage the human realm, humanity鈥檚 only hope are the Holy Knights, warriors who wield holy blades. However, the Holy Knight鈥檚 leadership is corrupt and has is disliked by most of the Holy Knight鈥檚 ranks. Adio, a prodigious Holy Knight, voices his discontent, only to be cast aside. This leads Adio to take up arms against his former organization, with the help of a fallen angel....