[​ROMANCE] KDrama/Movie that the leads didnt end up with each other

KDrama/Movie that the Romance y dont end up with each other

Ex: 

Male/Female Lead died at the end

Male/Female Lead married a different person

Memory lost

Like:

Tomorrow I Will Date With Yesterday’s You (JMovie)

I Give My First Love to You (JMovie)

Remember – War of the Son (Kinda, This has no Romance tho) (KDrama)

Uncontrollably Fond (KDrama)

The Day After We Broke Up (KDrama)

Here a view dramas without a love happy end:

Main Genre Revange
Bad Guy 
Cruel city
Shark
   
Main Genre Historical
Godess of fire (if I remember it right)
Empress Ki
Splash Splash Love
Bridal Mask
Moon Lovers (I cried so much because of this two)
     
Main Genre Melodrama
49 days
If in Love... like them
Mimi
Wind blowes in Winter
   
Main Genre Comedy Romance
Cheese in the Trap (more or less... it is a little open)

Action
Nine tailed fox

I hope there is any you like :)