All the leads are over 27:
Kdramas :
Cunning Single Lady (a woman try to take advantage of her ex-husband)
A Gentleman's Dignity (4 playboys in their 40th really fall in love)
I Need Romance (a girl try to break up with her cheating boyfriend)
Lie to me (fake relationship — rich guy poor girl)
My Love Eun Dong (A man in his 40th is searching for his missing fiancé for 10 years)
CDramas;
Loving, Never Forgetting (A guy finds out that he has a child and force the mother to be with him)
Lee Jun Kai (Mini drama — possessive ex-husband treats his ex-wife)