I'm not entirely sure specifically which 'gap dong real story' you're referring to. There could be many stories with that name or something similar. It might be a local or specific event that needs more context to explain accurately.
As I don't know the specific 'gap dong real story', it might be a personal story, a historical event, or a fictional - like story that has been given the name 'gap dong' within a particular context. There are so many possibilities that without more information, we can't go into details.
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.
The following are some of the recommended ancient novels with a large age gap: " Emperor's Favorite " Author: Mao Lian: This novel tells the story of a male and female protagonist with a large age difference. The female protagonist is 11 years old and the male protagonist is 19 years old. The female protagonist was not in good health because of the indifference of her family. She was brought into the palace to take care of her and became the sweetheart loved by everyone in the palace. 2. " Prince of the Blood Clan: The Irises Have Not Fallen ": The male and female protagonists were no more than ten years apart. The two of them were separated by a generation gap of more than a thousand years, but they were bound together by fate. These novels were all in the ancient language, telling the love story between the male and female protagonists. They were suitable for readers who liked ancient novels with a large age gap.