Ai Yori Aoshi

Description
Kaoru is a college boy with everything going for him. He lives in a mansion with his beautiful fiancé, Aoi, all his roommates are babes, and they all have the hots for him. There’s just one hitch: due to family complications, Kaoru and his beloved have to keep their engagement a secret. As he gets tangled in countless steamy situations, can Kaoru overcome temptation and stay true to the lovely Aoi? Two is company and eight is a party in this romping romance brought to you by the director of Saber Marionette J.

Plot
Kaoru Hanabishi appears to be an average university student, but in reality, he's the eldest son of Yūji Hanabishi, the head of the Hanabishi Zaibatsu, and was set to take over the zaibatsu after his father retired. His mother, Kumi Honjō, and his father never married, making life difficult for both him and his mother. Kaoru's father died when he was five years old. Since then, Yūji's grandfather, Gen'ichiro Hanabishi, took Kaoru under his wing and began educating him for the eventual succession. Yet Kaoru never felt at home in the Hanabishi family and left to live alone in self-imposed exile after his mother died. Day by day he felt alone, thinking that he was living life with no reason pushing him on.

There was, however, a person who loved Kaoru so much that she had to do whatever was necessary to be with him.

Her name is Aoi Sakuraba. Aoi is the only daughter of the owner of the Sakuraba Kimono Store (later renamed to Sakuraba Department Store). Kaoru's family and Aoi's family had accepted for Kaoru to marry Aoi, but after Kaoru walked out, the marriage was canceled. Both families had a friendly relationship and Aoi had been in love with Kaoru from the start, which Kaoru was unaware of. The Sakuraba family had already been searching for someone suitable, but Aoi was unwilling to marry someone else and walked out, chasing Kaoru.

Both were freed from their families' affairs, but did not know how to make their living. Miyabi Kagurazaki, who had been looking out for Aoi, offered the two a way. Aoi and Miyabi would live together in a grand western style summer house owned by the Sakuraba family and Kaoru would live in a house for servants next to it. This would prevent a scandal, much like the one that had made Kaoru's life difficult, as the two would be living separately. But soon, Kaoru's friends, who just happen to be attractive females, took residence in the house, and it quickly became a dormitory. Very soon, Aoi became a landlady of the dormitory.

Kaoru eventually comes to terms with his painful past by confronting the Hanabishis. Later, Kaoru's half brother attempts to gain control of the Hanabishi Zaibatsu by marrying Aoi, but Kaoru meets her father. Her father accepts Aoi's relationship with Kaoru, foiling his half-brother's plan.