This one is about a wedding they're both in. I think Hae first sees Hyuk in a Porsche somewhere and finds him rude. They end up setting up a wedding for a friend out on a farm and don't get along at all. Hae's car breaks down on the way home and a van with Hyuk's family stops to help. 

He ends up staying at least one night at the family's house and bonds with them, especially Hyuk's niece or little sister. He finds out Hyuk's not really a jerk after all and they eventually get together. 

There's a lot I can't remember but maybe someone can help.

Thanks 😊 

I was able to find this again on my own.

Flirtationship - Asianfanfics