Moonlight Garden (2017)

Blurb:
The enchanting flower maidens of Moonlight Garden are coveted by all, as they are known to provide sexual pleasures beyond the imagination. But Dohwa, a young flower maiden who has not yet “bloomed,” concocts potions in the hopes of escaping her destined fate at the brothel. One night, she is caught stealing ingredients for her potions by Lady Hyewon, the new mistress of the Garden. But it turns out Dohwa isn’t the only one with an agenda. Lady Hyewon harbors a few terrible secrets of her own.

Source: www.anisearch.com/manga/34753