Working for the nefarious Kisaragi Corporation, Sentouin Roku-gou is assigned a crucial task: aiding in the organization's quest to dominate the known universe. Fueled by overconfidence in his combat abilities, Roku-gou ventures into the kingdom of Grace, unaware of the impending challenges. Alongside Alice Kisaragi, a remarkable android companion, he encounters Snow, the kingdom's stalwart guardian. Their journey leads them to a pivotal relic, where Roku-gou's ambition for advancement leads to a comical mishap during a sacred ritual. Subsequently, he is coerced into serving as an honorary knight by the kingdom's princess. Now embedded in the heart of Grace, Roku-gou is torn between aiding his new allies against the Demon Lord's Army and carrying out villainous schemes for his employer.