Fleeing family trouble, Ren Uesugi and his older sister Mihato run out of money in the city and take jobs as live-in servants at the Kuonji estate. There they wait on the three Kuonji sisters, Shinra, Miyu, and Yume, under the watch of the ex-military head butler Colonel and the head maid Benisu. Ren trains as a butler while Mihato learns the maid's trade, navigating the demands of the wealthy household around them.