Cdramas with sad ending, open ending or unsatisfied ending

Sad ending and unsatisfied 

Confusing ending

the leads are not death and leave together, but not a satisfying ending

Sad and unsatisfied ending 

Confusing ending, like some episodes missing. Don’t know if the FL is alive or not

Sad ending 

Sad ending for the main couple.

Confusing ending

Sad ending 

Confusing ending 

Open ending, some consider happy ending, but not me. The female leads are not back at the end

Sad ending 

Sad ending

Sad ending

Everyone is alive except a side caracter, but the 2 main couples do not end up together. Also, it ends with a cliffhanger 

Open ending 

Confusing/open ending 

Sad ending