Kimi ga Aruji de Shitsuji ga Ore de

Based On a Visual Novel developed by Minato Soft. Due to family troubles, Ren Uesugi and his sister, Mihato, leave their home. They end up moving to the city but find themselves with a lack of money. Somehow they are able to find work in the form of the Kuonji family's mansion, being employed as servants to the three sisters of the Kuonji family: Shinra, Miyu, and Yume. Being a servant also associates Ren with the mansion's additional servants and the Kuonji sisters' friends. (Source: Wikipedia)

He is My Master

Izumi Sawatari and her younger sister, Mitsuki Sawatari, have run away from home and are in need of employment. The only jobs available are as maids in the mansion of 14-year-old millionaire, Yoshitaka Nakabayashi. What seems like simple work is soon revealed to be far more than the girls bargained for when they find Yoshitaka to be an authoritative employer who demands they call him "Master". (Source: Sentai Filmworks)

Majikoi: Oh! Samurai Girls

It's one thing to honor your ancestors and keep old traditions alive, but there IS such a thing as taking it to a ridiculous extreme. In Kawakami City, having a samurai ancestor and enormous 'fighting spirit' isn't just an interesting fact, it's a huge part of how you end up being ranked on the social totem pole. That, in turn, rolls over into the school curriculum. Fortunately, that's something the local kids like Yamato Naoe have learned to deal with by forming into small 'bands,' (that's the samurai type, NOT music). However, while the delicate sexual balance of Yamato's group seemed fine when there were three girls and four boys, the sudden addition of two MORE girls starts to send everything spinning out of control! (Source: Sentai Filmworks)