i want to watch dramas where it features multiple relationships it doesnt have to feature all relationships equally but each couple should get good screentime

All Kdramas I've watched with 50 episodes and up feature multi- relationships. 
try:
Another Miss Oh - there is a main couple but there are two side couples who get quite some screen time later in the story
Age Of Youth - story about a friendship and lives of 5 girls. some of them are in relationship, some of them get into relationship. it is really good story
Reply 1997 - there are two main couples
Reply 1988 - there are at least 3 main couples i think (also, both reply 1997 and 1988 are incredibly good dramas. i recommned with my whole heart!)

a gentlemen dignity
secret garden
ojagyo brothers
what happends with my family ?
dots
ugly alert
One more happy ending
Love Shuffle
Sunao ni narenakute
Tokyo Tarareba musume