The story revolves around an organization, the Musketeers, tasked with maintaining peace within the kingdom. Among them is Fujikura Ayato, a dedicated musketeer of the White Rose Academy, serving as the deputy chief under his sister (!), Miyabi. Despite the absence of blood ties, the team operates like a family, united in their battle against the lurking evils in the royal capital, Louvre. Their lives, though busy, are filled with purpose. However, this harmonious existence is abruptly disrupted when the dissolution of the White Rose Academy is announced. Faced with this harsh reality, they attempt to accept their fate. Yet, they soon discover another musketeer group, the Red Rose Academy, orchestrates this scheme. They must recruit individuals with exceptional skills to thwart the Red Rose Academy captain’s plan. Joining their ranks are three unique girls: Minami Mayu, a top-notch musketeer with a talent for misunderstanding situations; Reina de Medici, a seemingly flawless princess but slightly scatterbrained; and Sara Tifal, a foreigner who speaks in what sounds like utter nonsense. Together with Miyabi, they plan to strategize under one roof. However, their days are filled with unexpected antics - from turning into a bunny girl, sneaking into someone else’s futon, to needing help bathing. Amidst these sweet and chaotic days, they wonder if they can prevent the Red Rose’s conspiracy.