Witch's Romance - He works as her assistant later in the drama.
My Unfortunate Boyfriend - Work for the same firm, he's a gardner and she's a regular worker.
My Fair Lady - He works as her household manager/butler.
Madame Antoine - He's a psychologist and she's a fortune teller, they work in the same building and get involved with each other's business.
Introverted Boss - He's the CEO and she starts working for him.
Good Doctor - hospital romance.
Blood - hospital romance.
Baby-Faced Beauty - same firm, different departements.