On the outside Nachi is a student living with his cousin Shinya for free in exchange he's the "maid". What no one knows, not even his friend Kanda, is that he's also Shinya's sex partner. With Shinya's rude, arrogant behavior to Nachi how long will this "master" and "servant" relationship last? How long will Nachi be able to keep the truth about his relationship from Kanda?