Living in the high school student dormitories is first year Araki Jin, who's archeologist parents have sent him a mysterious lamp that, once polished, causes the academy's idol Zadou Sierra to abruptly appear! What's more, she is dressed in a maid outfit! After appearing, her father arrives and explains that Sierra is a descendent of a lamp genie, and that a genie needs to grant their master’s wishes in order to grow up. However, as a novice genie, Sierra cannot use her magical powers in any strong ways, and so she lives with the weak-bodied Jin making alot of tumultuous noise. Thus begins the fantastic story of Sierra, the Ojou-sama turned novice genie, and her master Jin.

(Source: Baka-Tsuki)