Sakuramau Niwa de, Kimi to

"I've found you, my spring." The Takatsukasa family is the largest conglomerate in the empire. Within their residence, there lie special gardens where all four seasons exist. These serve as a barrier, protecting the imperial capital from evil insects. The caretakers who maintain it are chosen from the four great families, each responsible for one season. Hio lost her parents when she was a child and was taken in by one of the great families, the Harusaki family. She's been bullied by the daughter of the family and is treated worse than a servant. Hio's fate changes when she plays her father's violin and is suddenly whisked away in the strong arms of Sakuto, the head of the Takatsukasa family. "You're the only one. You're the only one who can..." (Source: MangaPlaza)