Sana Bukas Pa Ang Kahapon (1983)

Three friends made their way in the big city. One ended up the mistress of a rich married man. Another became a suicidal prostitute. And the third found true love where it had always been all along despite her long fruitless search. In the end they all thought of the things they should never have done, wondering what might have been had these tomorrows been their yesterdays.