Love is likely a main theme. In many K - dramas, love plays a significant role in the characters' lives. It could be about finding true love, dealing with unrequited love, or growing through a relationship. Another theme might be self - discovery. The characters probably go through a journey of understanding themselves better.
Another theme is exploring the backstories of the characters more deeply. In the actual drama, there may not have been enough time to fully develop all the characters' pasts. Fanfictions can fill in those gaps, like delving into the character's family history or how they came to be the person they are in the drama.
Another place could be Wattpad. There are many Kdrama fans who post their fanfictions there. Look for the Snowdrop section or do a general search. However, the quality may vary, so you might need to sift through a bit to find the really good ones.
One great Kdrama to watch for a love story is 'Crash Landing on You'. It tells the story of a South Korean heiress who accidentally paraglides into North Korea and falls in love with a North Korean army officer. The chemistry between the lead characters is amazing, and the show beautifully depicts their journey of love across different cultures and political boundaries.
One common theme is unrequited love. For example, in many Kdramas, one character loves another deeply but that love is not returned immediately or at all. Another theme is separation due to external factors like family differences or social status. Just like in some dramas where a rich heir can't be with a poor girl because of family opposition.
'Strong Girl Bong - soon' could be considered similar. It has a strong female lead whose life story is at the center. Her journey in dealing with her special strength, finding love, and making a mark in the world makes it an interesting watch. Also, 'What's Wrong with Secretary Kim' has elements of a character's life story. The female lead, who has been a secretary for a long time, decides to change her life and in the process, there are love and self - discovery.