The Song About a Musician in Thang Long Citadel
Long Thành Cầm Giả Ca
Nguyễn Du meets a musician and they fall in love. But he already has a wife, and doesn't want to take her even when he meets her several times and even has sex with her later. He meets her when she is old, feeling sorry, writes a poem for her, and she jumps into a well that nobody wants to drink the water later.