Looking for a sad romance drama where the male character has unrequited love for a female, or a similar type of love triangle with a sorrowful male. Thanks!
Sad / tragic dramas where the FL is in a relationship with the SML but falls out of love with him and falls in love with the ML, but the FL and ML either don't get a happy ending or at the very least have to be apart for most of their lives:
Dramas where the SML gave up his opportunity to be with the FL when she had feelings for him and the ML stepped in before the SML could get a second chance, so that the SML's feelings became unrequited (and the ML and FL get a happy ending):