Ore no Shitsuji (♀) ga Iketeiru

A woman named Rui takes on extreme measures to support her younger brother, Kyo, who withdrew from society after a failed romantic confession. Struggling financially in a divided town, she is assisted by a friend to disguise herself as a man to work at a host club. After a disastrous first attempt, she is rescued by a wealthy man named Tohma, who finds her situation amusing. He offers her $10,000 in exchange for her working as his male butler until March of the following year, on the condition that her true identity remains hidden.