I'm looking for drama with slow pace and have a nice song. Because I tend to rewatch it when I want to sleep  so I'd prefer no loud or noisy sound.

This  is my favorite 3 dramas

  1. When the Weather Is Fine (2020) - MyDramaList 
  2. A Piece of Your Mind (2020) - MyDramaList 
  3. One Spring Night (2019) - MyDramaList 

PS. I really love song from one spring night, "Spring waltz"  

Something In The Rain (it's the same director for One Spring night)

Just Between Lovers

Prison Playbook (not focused on romance tho)

I am now watching King´s avatar and it has really nice songs but i have watched so many dramas that its hard to tell which one to watch and you didnt tell us your preference because only on songs i can tell you many dramas such as Korean odyssey, A life time love, An oriental odyssey, Angel´s last mission: love, Ashes of love, Birth of beauty, Bloody romance, Demon girl, Destiny’s love Ending again, Eternal love, Go princess go, Love and emperor, Moon lovers: scarlet heart ryeo, My little princess, Siege in fog, Destiny of white snake, The eternal love, King of blaze, Legend of white snake, Love by hypnotic, Romance of hua rong, Romance of tiger and rose, Sleepless princess, Untamed, Unique lady, Untouchable lovers. I dont really know which one you watched because your drama list looks empty.