Maid-san Hirotta!

One day, Yasuhiro meets a female maid. She seems to have lost all of her memories.... Therefore, he takes her to his house and she starts living there. According to her, her job includes not only housework but also erotic things.... Like this, his paradise life with her starts. However, there are two girls who don't like her. Matsuri, his old friend, and Shiho, his cousin. They also start living at his house. There is one boy and three girls at his house now. Something will happen...? Maybe....