The male and female leads are in love, but a special relationship she has with another guy causes major problems for their relationship. The guy might like her, but she only see him as a friend while she loves the male lead. In the end, she learns to let go and give her all to the male lead.

A girl and three sweethearts

 ShotaSidePart:

A girl and three sweethearts

Thanks, but seen it.

Cheese in the trap

Eternal love

Marriage not dating

The king's woman (pretty much any man who talks to her becomes a problem for the king. But most importantly, the protective figure she can lean on throughout the show) 

Bromance

Good Morning Call  

My Secret Romance

(have you sen these?)