Ao Bara-sama ni wa Himitsu ga Aru

Tenma, a maid who serves the Tsukishiro family, a family famous for their roses, has a crush on their handsome and mysterious heir, Aoi. Due to her position, she has lived her life hiding her feelings, but one day, when she accidentally touches Aoi, she feels a shock as if she has been pricked by a rose's thorn...! "The curse of the rose draws out the true feelings of those who touch it..." Tenma finds out that Aoi has been cursed with the "rose curse", but... (Source: Shogakukan, translated)