Ojou-sama no Inu! ~Boku no Subete wa Kimi no Mono?~

Hitoshi Feburary is the son and successor of a noble family.
However, the current head of the family has too many wasteful habits, and his father is now on the verge of bankrupcy.
Now with no place to live, Hitoshi wanders the roads in despair, and he has no choice but to listen to those words in his fathers will: "Seek out the Grape residence."
Greeting him upon his arrival are "Karen", the mistress of the house, and "Jasmin", the maid.
At first, Karen seemed to be a graceful girl, but when Hitoshi accidentally snaps at her, she boils over and her personality changes drastically.
After that, Hiroshi ends up serving as her butler, or perhaps he's more like a maid.
His everyday life now consists of having to fulfill Karen's every selfish request...

[From DLsite English]