This phrase most likely refers to the style of intense, dramatic, and often tragic love stories found in classic and modern Hindi cinema (Bollywood) where the love is "without sun"—meaning it is hidden, forbidden, unrequited, or doomed to darkness. It evokes the trope of Pyar Dosti Dushmani (Love, Friendship, Enmity) or the classic "Do Judoon Ishq" (Two hearts in love) scenario often seen in films like Goliyon Ki Raasleela Ram-Leela or Devdas .