May is a Cyberdoll delivered to Saotome Kazuya to be his maid. Problem is, she's 1/6th the size of a normal person, which gets her and Kazuya in trouble quite often. It doesn't help that the bill for the maid is way out of his budget. Seems like the company wants her back for nonpayment, and will resort to some dastardly deeds to do so.