Wet Lips in the Rain (1974)

Yeong and Hyeob are young underground musicians and very much in love until the day wehn Yeong witnesses Hyeob kissing a wealthy fan. She leaves him effectively breaking up their singing duo. She begins helping her friend Woo-jin in establishing a youth center but Woo-jin's estranged wife and a bitter Hyeob unite to make the pair miserable.