Like they put a lot of effort on the sounds, music, and the mood of the scenes. And likely it takes place in the same place or area. Something you want to watch while wrapping yourself in a warm blanket and just enjoy like a hot chocolate. 

When the Weather is Fine maybe? idk why, I haven't watched it fully, but it made me feel cosy when I did watch it.. maybe too many rain scenes haha?

Soft, modern-day romance dramas with good visuals and memorable soundtrack songs where the leads go to the same school or work in the same building:

Nostalgic and solemn atmospheric dramas...?

Director An Panseok has that aesthetics/feel/tone in his cinematography/narrative. so try Something in the rain, Secret love affair, One Spring Night.

also try: 

  • Go Ahead,
  • My Mister
  • Someday or One Day