In the heart of Shinjuku, there are a variety of nightclubs open to customers who seek a night of indulgence alongside gorgeous companions. Yamada is one of those companions, working part-time while attending university. Though lately, Yamada finds it easier to become the model hostess rather than a star pupil. She keeps to herself, follows the written and unwritten rules of hosting, and doesn't bother getting entangled with anyone if she can help it. That is, until Mii-chan stumbles into her life.

Mii-chan is adorable but useless. She can't read or write and is incredibly clumsy, always messing something up, which earns her ridicule from staff and customers alike. But something about her endless motivation and bright energy draws Yamada in, creating an unexpected friendship!