Hello, so i wonder if there is any good drama with more male/female leads then just one or two of them, about genre it can be : crime,action,thriler,detective but not really necessary, everything you think is similar to my question and you think its good, feel free to say :), thank you in advance for your replys :) 
Love Shuffle- different couples
Age of Youth- About a group of girls. Friendship, romance etc.
Ode To Joy - its about the life of 5 girls
I second the three that have already been mentioned, but to add:

plus nine boys - focuses on the lives & romances of three brothers & their uncle. 
the lover - about four different couples living in the same apartment complex
Generally dramas around 40-60 hours have atleast 3 couple storylines, 50 episode korean dramas and 50-80 episode Taiwan dramas