1 more to go. I don't actually remember too many weddings in dramas. They either get married close to the beginning because it is a not for love marriage or bit/support parts getting married as part of the plot. For me the leads rarely get married in the drama;it must be the dramas I choose. This title doesn't reallyt fit your request so I'll offer it this way.
BONUS: Wedding Plan - ML1 is a wedding planner, planning the wedding of ML2 (and falling for him) who is marrying the FL1 at both their parents urging. She has a long term partner (the other FL2) whom she runs away with on their (ML2 & FL1) wedding day so there is a wedding and it is a 'work emergency' - sort of.