I can't believe I forgot the name but does anyone know of the costume drama with the FL who likes to make tea cakes and gets engaged to some young lord, but doesn't realize the ML is the young lord? The ML's mom loves the FL right away and the FL's stepmom basically sells her to get married. Also the ML is part of some ridiculous group named the Four Young Lords of the capital or something like that.
It's a costume drama, the FL has a younger brother who helps her out of being locked in a woodshed in the beginning.