Interesting theme, usually Korean drama is about eccentric males haha. Some series that come to mind:
Flower Boy Next Door - FL is recluse like Hikikomori
Lucky Romance - FL is totally ruled by superstition
Penny Pinchers - FL is modern day Scrooge
Naeil's Cantabile - Korean version of Japanese series Nodame Cantabile, FL is wacky but talented pianist
The Queen of Office - Japanese remake, FL is big shot office manager. She demands her own, exclusive contract only to be hired as a contract worker