A young woman has inherited a valuable gem from her grandmother, placing her in grave danger. Her brother, determined to protect her, hires a bodyguard. The twist is that the bodyguard is a man who dresses in maid clothes. At first glance, he appears to be a sophisticated and elegant servant. However, when a threat emerges, his true nature is revealed: he has a foul mouth and possesses deadly accuracy with a gun. The series blends action and romance, following this unlikely pair as they navigate the perils surrounding the inherited jewel. The manga is written by Makoto, and its plot hinges on the contrast between the male lead's refined maid disguise and his harsh, combat-ready demeanor. The setting appears to be ambiguous, as the clothing styles do not clearly place the story in a specific time period. The narrative arcs focus on the protection of the gem, the developing relationship between the heiress and her dangerous maid, and the various confrontations that test the bodyguard's lethal skills.